Numbers 18:12-18

12All the best of the oil, and all the best of the wine, and of the wheat, the firstfruits of them which they shall offer to the LORD, them have I given to thee.1 13And whatever is first ripe in the land, which they shall bring to the LORD, shall be thine; every one that is clean in thy house shall eat of it. 14Every thing devoted in Israel shall be thine. 15Every thing that openeth the womb in all flesh, which they bring to the LORD, whether of men or beasts, shall be thine: nevertheless the firstborn of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem. 16And those that are to be redeemed from a month old shalt thou redeem, according to thy estimation, for the money of five shekels, after the shekel of the sanctuary, which is twenty gerahs. 17But the firstling of a cow, or the firstling of a sheep, or the firstling of a goat, thou shalt not redeem; they are holy: thou shalt sprinkle their blood upon the altar, and shalt burn their fat for an offering made by fire, for a sweet savour to the LORD. 18And the flesh of them shall be thine, as the wave breast and as the right shoulder are thine.