Numbers 18:1-2

New International Version

Duties of Priests and Levites

18 The Lord said to Aaron, “You, your sons and your family are to bear the responsibility for offenses connected with the sanctuary,^(A) and you and your sons alone are to bear the responsibility for offenses connected with the priesthood. ² Bring your fellow Levites from your ancestral tribe to join you and assist you when you and your sons minister^(B) before the tent of the covenant law.