Nedarim 47 - December 11, 17 Kislev

This week’s learning is sponsored by Robert and Paula Cohen in memory of Robert’s father, my grandfather, Joseph Cohen, Yosef ben Moshe HaCohen, z”l. Today’s daf is sponsored by Racheli Mendelson in loving memory of her mother, Shoshana bat Shraga Fivel and Rivkah. Someone can forbid someone else's item to themselves even after the item no longer belongs to the other (they die or sell it). But if someone forbids an item of their own to someone else, will it continue to be forbidden even after the one who forbade dies or sells the item to someone else? Rava proves from a braita that it will continue to be forbidden. If one uses the language of "konam these fruit to my mouth" or similar language, not only are the fruits forbidden but also items they are traded for or anything that grows from them. If someone says "konam these fruits to your mouth" (forbidding to someone else), are items they are traded for also forbidden? Do we say that since one can forbid another's property to oneself, one can also forbid an item that is not yet in existence (the traded item) to oneself, but not to another? Or do we say that since items that grow from them would be forbidden, then also traded items would be forbidden as well? They try to answer the question from two different sources that show that one can benefit from a traded item. However, both answers are rejected as perhaps the ab initio law is that one cannot benefit but the sources reflect cases where it was already done.