1 Chronicles 23:12-14

The sons of Kohath: Amram, Izhar, Hebron and Uzziel—four in all. The sons of Amram: Aaron and Moses. Aaron was set apart, he and his descendants forever, to consecrate the most holy things, to offer sacrifices before the LORD, to minister before him and to pronounce blessings in his name forever. The sons of Moses the man of God were counted as part of the tribe of Levi.