Bekhorot 48 elsewhere in Shas

Bekhorot 9a:4-5: If an individual has two donkeys, and both of his two donkeys had not previously given birth and they now gave birth to two males, one each, the owner gives two lambs to the priest.
Bava Batra 176a:1: Rav Pappa said: The halakha is that when a creditor gives a loan by oral contract, he can collect the debt from the heirs of the debtor after his death, but he cannot collect the debt from the purchasers of the debtor’s property.
Bekhorot 18b:14-15: And when the owner slaughters the animal, he is obligated to have gifts of the priesthood, i.e., the foreleg, the jaw, and the maw, taken from it.