Numbers 18:8-18

8Then the LORD said to Aaron, “Behold, I have put you in charge of My offerings. As for all the sacred offerings of the Israelites, I have given them to you and your sons as a portion and a permanent statute. 9A portion of the most holy offerings reserved from the fire will be yours. From all the offerings they render to Me as most holy offerings, whether grain offerings or sin offerings or guilt offerings, that part belongs to you and your sons. 10You are to eat it as a most holy offering,1 and every male may eat it. You shall regard it as holy.

11And this is yours as well: the offering of their gifts, along with all the wave offerings of the Israelites. I have given this to you and your sons and daughters as a permanent statute. Every ceremonially clean person in your household may eat it. 12I give you all the freshest olive oil and all the finest new wine and grain that the Israelites give to the LORD as their firstfruits. 13The firstfruits of everything in their land that they bring to the LORD will belong to you. Every ceremonially clean person in your household may eat them.

14Every devoted thing in Israel belongs to you. 15The firstborn of every womb, whether man or beast, that is offered to the LORD belongs to you. But you must surely redeem every firstborn son and every firstborn male of unclean animals. 16You are to pay the redemption price for a month-old male according to your valuation: five shekels of silver,2 according to the sanctuary shekel, which is twenty gerahs.3

17But you must not redeem the firstborn of an ox, a sheep, or a goat; they are holy. You are to splatter their blood on the altar and burn their fat as a food offering, a pleasing aroma to the LORD. 18And their meat belongs to you, just as the breast and right thigh of the wave offering belong to you.