Exodus 6:14, 25

These are the heads of their fathers’ houses: The sons of Reuben, the firstborn of Israel, were Hanoch, Pallu, Hezron, and Carmi. These are the families of Reuben.

Eleazar, Aaron’s son, took for himself one of the daughters of Putiel as wife; and she bore him Phinehas. These are the heads of the fathers’ houses of the Levites according to their families.