Today's daf is sponsored by Rena Kurs in loving memory of Dr. Leatrice Rabinsky, on her 7th yahrzeit. "She instilled the love of learning in all of her children, grandchildren and generations of students. May her memory be for a blessing."

Rav and Shmuel held that orphans cannot collect a loan of their parents from other orphans if the parent of the debtor died first, as a parent can't pass an oath on to one's children. Rabbi Elazar disagreed and permitted them to collect with an oath of orphans (that their father did not tell them that the loan was already collected). The rabbis of later generations tried to override Rav and Shmuel's opinion without success but managed to limit it in various ways.

Can one do a gilgul shvua in a case where the oath is a rabbinic oath?