Numbers 18:2-15

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.

⁴And they shall be joined to thee, and shall keep the charges of the tabernacle of witness, in all the services of the tabernacle; and a stranger shall not approach to thee.

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.

⁷And thou and thy sons after thee shall keep up your priestly ministration, according to the whole manner of the altar, and that which is within the veil; and ye shall minister in the services as the office of your priesthood; and the stranger that comes near shall die.

⁸And the Lord said to Aaron, And, behold, I have given you the charge of the first-fruits of all things consecrated to me by the children of Israel; and I have given them to thee as an honour, and to thy sons after thee for a perpetual ordinance.

⁹And let this be to you from all the holy things that are consecrated to me, even the burnt-offerings, from all their gifts, and from all their sacrifices, and from every trespass-offering of theirs, and from all their sin-offerings, whatever things they give to me of all their holy things, they shall be thine and thy sons'.

¹⁰In the most holy place shall ye eat them; every male shall eat them, thou and thy sons: they shall be holy to thee.

¹¹And this shall be to you of the first-fruits of their gifts, of all the wave-offerings of the children of Israel; to thee have I given them and to thy sons and thy daughters with thee, a perpetual ordinance; every clean person in thy house shall eat them.

¹²Every first-offering of oil, and every first-offering of wine, their first-fruits of corn, whatsoever they may give to the Lord, to thee have I given them.

¹³All the first-fruits that are in their land, whatsoever they shall offer to the Lord, shall be thine: every clean person in thy house shall eat them.

¹⁴Every devoted thing among the children of Israel shall be thine.

¹⁵And every thing that opens the womb of all flesh, whatsoever they bring to the Lord, whether man or beast, shall be thine: only the first-born of men shall be surely redeemed, and thou shalt redeem the first-born of unclean cattle.