Numbers 18:2
And your brethren also of the tribe of Levi, the tribe of your father, bring you with you, that they may be joined unto you, and minister unto you: but you and your sons with you shall minister before the tabernacle of witness.
And your brethren also of the tribe of Levi, the tribe of your father, bring you with you, that they may be joined unto you, and minister unto you: but you and your sons with you shall minister before the tabernacle of witness.