Study Bava Metzia folio 100A with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
Mishnah: With regard to one who exchanges a cow for a donkey, such that by virtue of the cow owner’s act of acquisition on the donkey, the donkey’s erstwhile owner simultaneously acquires the cow, wherever it happens to be located, and afterward the cow is found to have calved; and similarly, wit
The Mishnah continues: There is a case of one who had two Canaanite slaves, one large, worth more on the slave market, and one small, worth less on the slave market, and similarly, one who had two fields, one large and one small. He sold one of them, and there was a dispute between the buyer and
If the buyer says: I purchased the large one, and the other one, i.e., the seller, says: I do not know which I sold; the buyer is entitled to take the large one.
If the seller says: I sold the small one, and the other one, i.e., the buyer, says: I do not know which one I purchased; the buyer is entitled to take only the small one.
If this one says: The large one was sold, and that one says: The small one was sold, then the seller takes an oath that it was the small one that he sold, and then the buyer takes the small one.