Numbers 18:5-7 And you shall keep the charge of the holy things, and of the altar, so that there shall not be wrath among the children of Israel.

Thomson⁽ⁱ⁾ ⁵ And you shall keep the charge of the holy things, and of the altar, so that there shall not be wrath among the children of Israel. ⁶ I have indeed taken your brethren, the Levites, from among the children of Israel, as a gift presented to the Lord to perform the services of the tabernacle of the testimony; ⁷ therefore thou, and thy sons with thee, shall keep your priesthood, as far as the altar is concerned, and what is within the veil; and you shall perform these services as a privilege of your priesthood; and any one of another family who approacheth shall be put to death.