9 You will give the Levites to Aaron and to his descendants; they are surely assigned to him from among the Israelites.
10 But you will count Aaron and his descendants; they will keep their priesthood, and the stranger who approaches will be put to death.”
11 Yahweh spoke to Moses saying,
12 “I myself receive the Levites from the midst of the Israelites in the place of all the firstborn of the offspring of the womb from the Israelites. The Levites will be mine
13 because all the firstborn are mine; on the day of my killing all the firstborn in the land of Egypt, I consecrated for myself all the firstborn in Israel, both humankind and animal; they will be mine. I am Yahweh.”
14 Yahweh spoke to Moses in the desert of Sinai, saying,
15 “Muster the descendants of Levi according to their families, according to their clans. You will count every male from one month and above.”