Numbers 18:4

²And take to thyself thy brethren the tribe of Levi, the family of thy father, and let them be joined to thee, and let them minister to thee; and thou and thy sons with thee shall minister before the tabernacle of witness.

³And they shall keep thy charges, and the charges of the tabernacle; only they shall not approach the holy vessels and the altar, so both they and you shall not die.

— Numbers 18:4 —

⁵And ye shall keep the charges of the holy things, and the charges of the altar, and so there shall not be anger among the children of Israel.

⁶And I have taken your brethren the Levites out of the midst of the children of Israel, a present given to the Lord, to minister in the services of the tabernacle of witness.