Exodus 6:14, 25

These are the heads of their fathers’ houses: the sons of Reuben, the firstborn of Israel: Hanoch, Pallu, Hezron, and Carmi; these are the clans of Reuben.

Eleazar, Aaron’s son, took as his wife one of the daughters of Putiel, and she bore him Phinehas. These are the heads of the fathers’ houses of the Levites by their clans.