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Weekly Halacha

Selected Halachos relating to Parshas Achrei Mos

By Rabbi Doniel Neustadt

The following is a discussion of Halachic topics related to the Parsha of the week. For final rulings, consult your Rav.

Any man shall not approach his close relative to uncover shame... (Lev. 18:6)


This verse is cited by most of the early authorities as the Biblical source for the halachos of yichud, the prohibition against a man being alone in a secluded place with a woman. The laws of yichud are complex and detailed and the opinions of the poskim are diverse and contradictory. This discussion will focus exclusively on the rulings of Harav Moshe Feinstien, one of the greatest halachic authorities of our generation. Dissenting opinions appear in the footnotes. A final rulings will depend on the specific circumstances of each situation and the individual rav's decision according to the facts presented to him.


Unless they are married, a man may not be alone with any woman, and a woman may not be alone with any man, with the following exceptions:

  1. His mother and grandmother; her father and grandfather.

  2. His daughter and granddaughter; her son and grandson.

  3. His sister; her brother. Brother and sister may not live together in the same house for a period of time which exceeds the normal stay of a house guest. They should also not be left together unchaperoned when their parents are away for an extended period of time (1).

  4. His father's sister and his mother's sister (2). They may not live together in the same house for a period of time which exceeds the normal stay of a house guest.

  5. His adopted daughter; her adopted son. This is permitted only as long as both adoptive parents are alive and married to each other (3). (Example: An adoptive father may not be secluded with his adopted daughter after his wife passes away, or if he divorces his wife.)

Yichud with a daughter-in-law or a mother-in law is strictly forbidden (4).


A man over thirteen is prohibited to be alone with a girl over three. Under extenuating circumstances, it is permitted to be alone with a girl till the age of seven (5).

A woman over twelve may not be alone with a boy over nine.

In certain circumstances it is permitted for a woman to be alone with an old man who is bedridden (6). A rav must be consulted.


Under certain conditions, the prohibition of yichud may be circumvented. These conditions include:

  • if her husband [or his wife] is in town;
  • if the door is open;
  • if more than one man is present;
  • if more than two women are present;
  • if a child or another chaperon is present.
Each one of these conditions has its own sets of rules, so they must be explained individually.

An important note: The halachos described below apply to yichud with a G-d fearing, observant Jew. When the man with whom the yichud will occur is a non-Jew or a secular Jew [referred to in halachah by the Hebrew term parutz], some of the halachos change. A rav should be consulted.


"In town" means he is able to come home at any time he chooses (7). Even if he works on the other side of town, as long as he makes his own hours [like a salesman does], it is considered as if he is "in town". If, however, he works fixed hours and cannot leave his workplace whenever he wants, it is considered as if he is "out of town" (8).

When the husband is "in town", the fear of his appearing suddenly is a deterrent to engaging in illicit behavior. But the wife only fears her husband's sudden appearance in a place where he is likely to find her (e.g., her home; her office). If, however, she secludes herself in a place where her husband will not easily find her, yichud is forbidden even if her husband is "in town" (9).

Her husband's presence "in town" does not set aside the prohibition of yichud if a close, long-standing friendship exists between the man and the woman (10).

Although a husband's presence "in town" alleviates the prohibition of yichud for his wife, the reverse is not true. A wife "in town" [but not in the house or in the immediate vicinity] does not mitigate her husband's yichud prohibition (11).


The door does not need to be actually open to permit yichud. Even if the door is closed but not locked, or even if it is locked but there is a reasonable possibility that people may knock on the door [or ring the bell] and expect to be answered, yichud is permitted (12).

Even if the door is locked but the window shades or drapes are open and there is a clear view into the room, yichud is permitted (13).

When driving on an open highway, one should not be alone with a woman in a car. Under extenuating circumstances, one may be lenient, even at night and even with a non-Jewish driver (14).

It is proper to be stringent and not rely on the "open door" leniency if a close, long-standing friendship exists between the man and the woman (15).


Yichud is permitted with two or more men during the day time and evening hours, and with three or more men during nighttime sleeping hours (16).


The rishonim argue whether (17) yichud is permitted when more than two women are present. Rashi, quoted by Rama, holds that when three (18) women are present yichud is permitted (19). Rambam, quoted by Shulchan Aruch, holds that the presence of a greater number of women does not alleviate the prohibition of yichud. The basic halachah follows the view of the Rambam (20). Consequently, a man may not be alone even with a hundred women (21).


During daytime and evening hours, yichud is permitted if a child is also present. During nighttime sleeping hours, two children are required. There are conflicting opinions (22) as to the minimum and maximum ages for the child as regards to this halacha. Harav Feinstein is quoted (23) as ruling that either a boy or a girl chaperone must be at least seven years old. Once a boy or a girl reaches Bar/Bas Mitzvah, they are no longer considered children (24).


A man is permitted (25) to be secluded with a woman in the presence of the man's grandmother, mother, daughter, granddaughter or sister (26) [of any age over seven]. During nighttime sleeping hours, an additional chaperon is required.

Two sisters cannot serve as chaperons for each other (27). Thus yichud with two sisters is forbidden.

A man and a woman may remain alone in a home where the parents of one of them are sleeping (28).

During regular office hours, a woman may be alone with her doctor. After regular office hours, her husband or a child must accompany her (29).

Yichud is prohibited even for a very short time, as long as the possibility exists that it may last for a longer time (30). Being together in an elevator, though, is not forbidden because of yichud (31).

Yichud is prohibited even if the man and the woman are in two separate rooms in the same house and each one can lock his/her door from the inside (32).


1 Igros Moshe EH 4:64-3. While all poskim agree that one may not "live" with his sister, there are different opinions as to what "live" means. Some (Imrei Yosher 2:43) hold that less than thirty days is permitted, while others (Shevet Halevi 5:201-2) hold no more than three days is permitted. According to Harav Feinstein's ruling quoted above, it all depends on the length of stay of a typical house guest. Thus a sister who is visiting from a distant city may stay longer than a sister visiting from a nearby area, just as a guest from afar stays longer than a guest from nearby.

2 Igros Moshe EH 4:64-1. Not all poskim agree with this leniency.

3 Igros Moshe EH 4:64-2. Almost all other poskim disagree and hold that yichud is not permitted with adopted children. See Halachah Discussion Vayigash 5755 for elaboration.

4 Igros Moshe EH 4:63; 64-1. This is the opinion of most poskim. There is a minority view (Rashash Kiddushin 81b; Salmas Yosef 34) that allows yichud with these relatives.

5 Oral ruling by Harav M. Feinstein (quoted in Children in Halachah pg. 40) based on the rational presented in Igros Moshe EH 4:65-12, where, in the final analysis, Harav Feinstein is hesitant to permit this. He writes, however, that he would not object to those who are lenient.

6 Igros Moshe EH 4:65-10. See also Tzitz Eliezer 6:40-22.

7 A husband who is jailed, is not considered "in town" - Igros Moshe EH 4:65-7.

8 Igros Moshe EH 4:65-7. Other poskim rule that as long as he is in town, even if he is presently unable to come, it is still considered as if he is in town. See Halachah Discussion - Parshas Vayeshev 5755 for elaboration.

9 Igros Moshe EH 4:65-21. In addition, some poskim hold that a husband "in town" only serves as a deterrent when the wife is meeting the man without the husband's knowledge. If, however, they are meeting with his permission [either in her home or in his] then the wife will not be as deterred by her husband being in town (see Binas Adam 126:27 for an elaborate explanation). Other poskim (Chida, Chazon Ish) do not agree with this stringency. Igros Moshe rules that while it is appropriate to be stringent, under extenuating circumstances one can be lenient.

10 EH 22:8. See Igros Moshe YD 2:35.

11 Igros Moshe EH 4:65-6. Other poskim are more lenient. See Halachah Discussion Parashas Vayeshev for elaboration.

12 Igros Moshe EH 4:65-4. Harav Feinstein's ruling here is extremely lenient and it goes against the view of all other poskim. While many poskim are of the opinion that an unlocked door is considered an "open door", or even that a locked door is considered an "open door" when someone with a key may come in at any time, no other poskim allow yichud behind locked doors just because someone who may knock on the door and expects to be acknowledged may come. Oholei Yeshurun pg. 14 quotes Harav Feinstein as ruling that this leniency can only be relied upon under extenuating circumstances.

13 Igros Moshe EH 4:65-2.

14 Igros Moshe YD 2:82; EH 4:65-3. Many other poskim are lenient about yichud in a car at all times - see Dvar Halacha 15:1 quoting Harav S.Z. Auerbach, Shevet Halevi 5:202-1. See Otzar Haposkim EH 22:35-8 for more opinions.

15 Igros Moshe EH 4:60; 4:65-9, based on Beis Shmuel and Chelkas Mechokek EH 22:13, unlike the Taz 22:5 who is lenient.

16 Igros Moshe EH 4:65-15, based on Rama EH 22:5. Most poskim agree with this.

17 Rashi Kiddushin 81b, quoted in Rama EH 22:5.

18 During nighttime sleeping hours, some poskim hold that Rashi requires a minimum of four women. Under extenuating circumstances, three women are sufficient [even according to Rashi's view]- Igros Moshe EH 4:65-20

19 An exception to this leniency is when the man and women involved are business associates or the man's job is such that he must deal directly with these women, e.g., a salesman of women's clothing.

20 Igros Moshe EH 4:65-14. Mharsha"m 3:152 also rules like the Rambam. Divrei Malkiel 4:102 rules in accordance with Rashi's view. Shevet Halevi 3:183 is lenient only under extenuating circumstances.

21 Ramban and Ran Niddah 5a.

22 See Dvar Halachah pg. 50-52 for all of the views - some allow yichud in the presence of a girl over age three and a boy over age five or six.

23 Children in Halachah pg. 46-47; Oholei Yeshurun pg. 17.

24 Other poskim hold that once they reach age nine they are no longer considered children. See also Igros Moshe OC 1:26 where he quotes, without dissent, the view of the Bach that nine is the maximum age to being a chaperon. It seems correct, therefore, that the maximum age of Bar/Bas Mitzvah should be relied upon only under extenuating circumstances.

25 Some poskim do not agree with this leniency, but many others do.

26 Igros Moshe EH 2:15; 4:65-8. Possibly, his father's or mother's sister are also considered chaperons.

Igros Moshe EH 4:64-3 seems, without explanation, to permit yichud with a woman and her daughter or granddaughter. If this is truly Harav Feinstein's view [it may very well be that this is a printing error], it is contrary to the view of all other poskim and is against the basic principles of hilchos yichud. This ruling should not be relied upon without further investigation.

27 Igros Moshe EH 4:64-3.

28 Oral ruling by Harav Feinstein quoted in Oholei Yeshurun pg. 7.

29 Igros Moshe EH 4:65-1. Many poskim agree with this, while others are more stringent.

30 Igros Moshe EH 4:65-16. See also Minchas Shlomo 91.

31 Igros Moshe EH 4:65-22. Most poskim agree with this leniency.

32 Igros Moshe EH 4:65:19. Other poskim are lenient in this case, see Chazon Ish 34:2 and Salmas Chaim 151.

Weekly-Halacha, Copyright © 1997 by Rabbi Neustadt, Dr. Jeffrey Gross and Project Genesis, Inc. Rabbi Neustadt is the principal of Yavne Teachers' College in Cleveland, Ohio. He is also the Magid Shiur of a daily Mishna Berurah class at Congregation Shomre Shabbos.

The Weekly-Halacha Series is distributed L'zchus Hayeled Doniel Meir ben Hinda. Weekly sponsorships are available--please send email to the moderator, Dr. Jeffrey Gross

The series is distributed by the Harbotzas Torah Division of Congregation Shomre Shabbos, 1801 South Taylor Road, Cleveland Heights, Ohio 44118--HaRav Yisroel Grumer, Marah D'Asra



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