There is a Gemara in Kesuvos (2b–3a) where it says that if someone divorced someone on condition and then didn't fulfill the condition, the woman doesn't become divorced, she becomes un-married ...
The Rambam (Melachim 5:9 - English here) lists the conditions whereby one is allowed to leave the Land of Israel. (Also discussed here). Once one moves to the Land of Israel, it would appear that he ...
Can I make a condition that any money I think to donate to Tzedakah is an invalid donation until I actually give it?
Is it possible to make a Tenai [condition] that any money I think to donate to Tzedakah is an invalid donation until I actually give it? I would want to do this because a Meshulach [collector] may ...