Numbers 18:15-17

15EverythingH3605 that openeth the wombH7358, of all fleshH1320 which they offer unto Jehovah, both of manH120 and beast shall beH1961 thine: neverthelessH389 the first-born of manH120 shalt thou surelyH389 redeemH6299, and the firstling of uncleanH2931 beasts shalt thou redeemH6299. 16And those that are to be redeemedH6299 of them from a monthH2320 old shalt thou redeemH6299, according to thine estimation, for the moneyH3701 of fiveH2568 shekelsH8255, after the shekelH8255 of the sanctuaryH6944 (the same is twentyH6242 gerahsH1626). 17But the firstling of a cow, or the firstling of a sheep, or the firstling of a goatH5795, thou shalt not redeemH6299; they are holyH6944: thou shalt sprinkleH2236 their bloodH1818 upon the altarH4196, and shalt burn their fatH2459 for an offeringH801 made by fireH801, for a sweet savor unto Jehovah.