Numbers 3:12

“And you shall take the Levites for Me, I am Yahweh, instead of all the firstborn among the sons of Israel, and the cattle of the Levites instead of all the firstborn among the cattle of the sons of Israel.”

“Take the Levites instead of all the firstborn among the sons of Israel and the cattle of the Levites. And the Levites shall be Mine; I am Yahweh.

“Thus you shall separate the Levites from among the sons of Israel, and the Levites shall be Mine.

for they are wholly given to Me from among the sons of Israel. I have taken them for Myself instead of every first issue of the womb, the firstborn of all the sons of Israel.

“And behold, I Myself have taken your brothers the Levites from among the sons of Israel; they are a gift to you, given to Yahweh, to perform the service for the tent of meeting.

“Yet they shall be ministers in My sanctuary, having oversight at the gates of the house and ministering in the house; they shall slaughter the burnt offering and the sacrifice for the people, and they shall stand before them to minister to them.

“Then you will know that I have sent this commandment to you, that My covenant may continue with Levi,” says Yahweh of hosts.