Numbers 18:13

You shall eat of it like the most holy things. Every male shall eat of it. It shall be holy to you.

“This is yours, too: the wave offering of their gift, even all the wave offerings of the children of Israel. I have given them to you, and to your sons and to your daughters with you, as a portion forever. Everyone who is clean in your house shall eat of it.

“I have given to you all the best of the oil, all the best of the vintage, and of the grain, the first fruits of them which they give to the LORD.

“Everything devoted in Israel shall be yours.

Everything that opens the womb, of all flesh which they offer to the LORD, both of man and animal, shall be yours. Nevertheless, you shall surely redeem the firstborn of man, and you shall redeem the firstborn of unclean animals.

You shall redeem those who are to be redeemed of them from a month old, according to your estimation, for five shekels of money, according to the shekel of the sanctuary, which weighs twenty gerahs.