Numbers 18:13

10 As the most holy things shalt thou eat thereof; every male shall eat thereof: it shall be holy unto thee.

11 And this is thine: the heave-offering of their gift, even all the wave-offerings of the children of Israel; I have given them unto thee, and to thy sons and to thy daughters with thee, as a portion for ever; every one that is clean in thy house shall eat thereof.

12 All the best of the oil, and all the best of the vintage, and of the grain, the first-fruits of them which they give unto Jehovah, to thee have I given them.

13 The first-ripe fruits of all that is in their land, which they bring unto Jehovah, shall be thine; every one that is clean in thy house shall eat thereof.

14 Everything devoted in Israel shall be thine.

15 Everything that openeth the womb, of all flesh which they offer unto Jehovah, both of man and beast shall be thine: nevertheless the first-born of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem.

16 And those that are to be redeemed of them from a month old shalt thou redeem, according to thine estimation, for the money of five shekels, after the shekel of the sanctuary (the same is twenty gerahs).