TSK · Numbers 18:2

And she conceived again, and bare a son; and said, Now this time will my husband be joined unto me, because I have borne him three sons: therefore was his name called Levi.

And thou shalt give the Levites unto Aaron and to his sons: they are wholly given unto him on the behalf of the children of Israel.

And I have given the Levites as a gift to Aaron and to his sons from among the children of Israel, to do the service of the children of Israel in the tent of meeting, and to make atonement for the children of Israel; that there be no plague among the children of Israel, when the children of Israel come nigh unto the sanctuary.

to be a memorial unto the children of Israel, to the end that no stranger, that is not of the seed of Aaron, come near to burn incense before Jehovah; that he be not as Korah, and as his company: as Jehovah spake unto him by Moses.

And they shall be joined unto thee, and keep the charge of the tent of meeting, for all the service of the Tent: and a stranger shall not come nigh unto you.

And they stood in their place after their order, according to the law of Moses the man of God: the priests sprinkled the blood [which they received] of the hand of the Levites.

And ye shall know that I have sent this commandment unto you, that my covenant may be with Levi, saith Jehovah of hosts.