רב יצחק בריה דרב יהודה

Rav Yitzchak brei d’Rav Yehuda was an amora whose teachings appear across the Talmud Bavli, often dealing with practical questions of halacha. He brings rulings he learned from his father, opening more than once with the phrase “to me it was explained by my father.” In Eruvin (80b) he relates his father’s measure for what counts as many versus few inhabitants regarding the food of two meals, and in Eruvin (97a) he cites his father’s explanation of bringing objects in pairs before sunset.

He is recorded across a range of subjects. In Beitzah (16a) he teaches that the fat on a knife, scraped off, can serve for an eruv tavshilin if it has the requisite measure. In Eruvin (84a) he resolves a case concerning a pit full of water that has been diminished. In Menachot (42b) he is described testing techeiles with various substances. In Shabbat (21a) he gives his view on the identity of “shemen kik,” and in Shabbat (91a) he challenges a ruling of Rabbi Meir regarding one who carries out a single grain for planting. In Moed Katan (17b) he explains a difficult expression with the teaching that the chaza”l’s words can bring ruin.