17“But you shall not redeem the firstborn of a cow, or the firstborn of a sheep, or the firstborn of a goat. They are holy. You shall sprinkle their blood on the altar, and shall burn their fat for an offering made by fire, for a pleasant aroma to Yahweh.
18Their meat shall be yours, as the wave offering breast and as the right thigh, it shall be yours.
19All the wave offerings of the holy things which the children of Israel offer to Yahweh, I have given you and your sons and your daughters with you, as a portion forever. It is a covenant of salt forever before Yahweh to you and to your offspring with you.”
20Yahweh said to Aaron, “You shall have no inheritance in their land, neither shall you have any portion among them. I am your portion and your inheritance among the children of Israel.
21“To the children of Levi, behold, I have given all the tithe in Israel for an inheritance, in return for their service which they serve, even the service of the Tent of Meeting.
22Henceforth the children of Israel shall not come near the Tent of Meeting, lest they bear sin, and die.
Numbers 18
Numbers 18:17-22