Numbers 27:9

Him. The Jews observe, that if the father of the deceased were still alive, he would take the inheritance. (Selden, Success. xii. and xiii.) But if his wife were inclined to marry again, she might insist on his next relation taking her, before she could be required to give up his goods, Deuteronomy xxv. 5. Hence the Gemarra of Babylon says, "If we are the daughters of Salphaad, let them give us his estate; but if we are not his daughters, let them make the brother of Salphaad marry our mother."