About this shiur
A discussion on the halachic requirement for an open slit to constitute a corner.
A 5 min halacha shiur by Rabbi Daniel Glatstein. Like every video on Lehallel, it was judged and approved under the Lehallel law before it ever appeared — no unreviewed result is ever shown.


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Recently approved from the same speaker: “The Mitzvah of Having Salt on the Table - Mishna Berura Daf Hashavua Siman 167 Seif 5” (16:55) · “Ki Seitzei: Tznius - The Middah that Transcends All” (4:45) · “5 Sharp Divrei Torah on Parshas Ki Seitzei” (10:27).
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What’s said in this shiur
The opening of this shiur, in Rabbi Daniel Glatstein’s own words— taken from the captions, so names and Hebrew terms may be approximate.
we mentioned uh we're talking about basically undershirt situs. So we said the issue with it is that in order for it to have four corners, it has to be mostly open. In other words, uh often what the way the undershirt sits works are they have sleeves. They're closed under the arm and then they're open. They're slit open. But you need the majority of the height to be open. If it's not mostly open, it's not. And we're not gonna count the sleeve And we're not gonna count the sleeve part, meaning the the hole that you stick your arms through is not counted. So, it needs to be open besides the hole that you put your arms through. However, besides that, it needs to be obviously open because if it's royopen, but it's not clear to the onlooker that it's royopen, then there's an issue of marasa, which is interesting. It's a talis kan. If you're wearing it under your shirt, nobody sees. I guess that wouldn't be an issue. uh it I guess that wouldn't be an issue. uh it would it would only be an issue if you're wearing it over your over your sleeves or or maybe even if you're wearing it under if it's actual there is an idea that um something that you couldn't do out in the open even it's a problem by so the says that you have to make sure that when it is it's Okay.
Jump to a moment
- 0:31we mentioned uh we're talking about basically undershirt situs. So we said the issue with it…
- 1:03And we're not gonna count the sleeve part, meaning the the hole that you stick your…
- 1:35I guess that wouldn't be an issue. uh it would it would only be an issue…
- 2:06Let's say it's mostly open. Let's say like this. Yeah. Let's say our talis and you…
- 2:40even if you tie it tightly it's not exempt from if you make hooks on the…
- 3:15>> Again the the is not on is not on the thing. It doesn't change the…
- 3:45open. Well, you most capas are not having rounded corners. >> Do they? >> I haven't…
- 4:16If it was mostly closed, then you putus and then you opened it or let's say…
About Rabbi Daniel Glatstein on Lehallel
10,253 approved videos from 2018 to 2026, 1,875 of them searchable by their own words. Open all of Rabbi Daniel Glatstein’s shiurim →
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Key takeaways
- Halacha — 5 min, by Rabbi Daniel Glatstein
- Approved by the Lehallel judge before appearing — never an unreviewed result
- Watch free during prelaunch on Lehallel
Watch this now
Don’t just read about it — watch it
The Requirement of the Majority of an Open Slit To Constitute a Corner4:57
The Mitzvah of Having Salt on the Table - Mishna Berura Daf Hashavua Siman 167 Seif 516:55
Ki Seitzei: Tznius - The Middah that Transcends All4:45Every video is reviewed against one written standard before it can play.
