1 Chronicles 23:12-14

The sons of Kohath; Amram, Izhar, Hebron, and Uzziel, four. The sons of Amram; Aaron and Moses: and Aaron was separated, that he should sanctify the most holy things, he and his sons for ever, to burn incense before the LORD, to minister unto him, and to bless in his name for ever. Now concerning Moses the man of God, his sons were named of the tribe of Levi.