Numbers 18:14-18

¹⁴Every devoted thing among the children of Israel shall be thine.

¹⁵And everything that opens the womb of all flesh, whatsoever they bring to the Lord, whether man or beast, shall be thine: only the firstborn of men shall be surely redeemed, and thou shalt redeem the firstborn of unclean cattle.

¹⁶And the redemption of them shall be from a month old; their valuation of five shekels—it is twenty oboli according to the holy shekel.

¹⁷But thou shalt not redeem the firstborn of calves and the firstborn of sheep and the firstborn of goats; they are holy: and thou shalt pour their blood upon the altar, and thou shalt offer the fat as a burnt offering for a smell of sweet savor to the Lord.

¹⁸And the flesh shall be thine, as also the breast of the wave offering and as the right shoulder, it shall be thine.