Numbers 18:17-22

¹⁷But you shall not redeem the firstborn of calves and the firstborn of sheep and the firstborn of goats; they are holy: and you shall pour their blood upon the altar, and you shall offer the fat as a burnt offering for a smell of sweet savour to the Lord.

¹⁸And the flesh shall be your, as also the breast of the wave-offering and as the right shoulder, it shall be your.

¹⁹Every special offering of the holy things, whatever the children of Israel shall specially offer to the Lord, I have given to you and to your sons and to your daughters with you, a perpetual ordinance: it is a covenant of salt for ever before the Lord, for you and your seed after you.

²⁰And the Lord said to Aaron, You shall have no inheritance in their land, neither shall you have any portion amongst them; for I am your portion and your inheritance in the midst of the children of Israel.

²¹And, behold, I have given to the sons of Levi every tithe in Israel for an inheritance for their services, whenever they perform ministry in the tabernacle of witness.

²²And the children of Israel shall no more draw near to the tabernacle of witness to incur fatal guilt.