Numbers 18:16

The first-ripe fruits of all that is in their land, which they bring to the LORD, shall be yours. Everyone who is clean in your house shall eat of it.

“Everything devoted in Israel shall be yours.

Everything that opens the womb, of all flesh which they offer to the LORD, both of man and animal, shall be yours. Nevertheless, you shall surely redeem the firstborn of man, and you shall redeem the firstborn of unclean animals.

“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 the LORD.

Their meat shall be yours, as the wave offering breast and as the right thigh, it shall be yours.

All the wave offerings of the holy things which the children of Israel offer to the LORD, I have given you and your sons and your daughters with you, as a portion forever. It is a covenant of salt forever before the LORD to you and to your offspring with you.”