Numbers 3:9,32
And you shall give the Levites to Aaron and to his sons: they are wholly given to him out of the children of Israel.
Nave's Topical Index—AKJV

Numbers 4:19,28,33
But thus do to them, that they may live, and not die, when they approach to the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden:
Nave's Topical Index—AKJV

1 Chronicles 9:20
And Phinehas the son of Eleazar was the ruler over them in time past, and the LORD was with him.
Nave's Topical Index—AKJV