Numbers 18:6-7 ▼

6 And I, behold, have taken your brothers the Levites from the midst of the sons of Israel; they are a gift given to you by YHWH to do the service of the Tent of Meeting;

7 and you and your sons with you keep your priesthood for everything of the altar and within the veil, and you have served; I make your priesthood a gift [for] service; and the stranger who is coming near is put to death.”