Numbers 18:12-19

12“I give you all the finest olive oil and all the finest new wine and grain they give the LORD as the firstfruits of their harvest.

13All the land’s firstfruits that they bring to the LORD will be yours. Everyone in your household who is ceremonially clean may eat it. 14“Everything in Israel that is devoted The Hebrew term refers to the irrevocable giving over of things or persons to the Lord. to the LORD is yours. 15The first offspring of every womb, both human and animal, that is offered to the LORD is yours. But you must redeem every firstborn son and every firstborn male of unclean animals.

16When they are a month old, you must redeem them at the redemption price set at five shekels That is, about 2 ounces or about 58 grams of silver, according to the sanctuary shekel, which weighs twenty gerahs. 17“But you must not redeem the firstborn of a cow, a sheep or a goat; they are holy. Splash their blood against the altar and burn their fat as a food offering, an aroma pleasing to the LORD . 18Their meat is to be yours, just as the breast of the wave offering and the right thigh are yours.

19Whatever is set aside from the holy offerings the Israelites present to the LORD I give to you and your sons and daughters as your perpetual share. It is an everlasting covenant of salt before the LORD for both you and your offspring.”