Numbers 18:16-22

¹⁶And those that are to be redeemed from a month old shalt thou redeem, according to the usual estimation of five shekels of silver, after the shekel of the sanctuary, which is twenty gerahs.

¹⁷But the firstling of an ox, or the firstling of a sheep, or the firstling of a goat, thou shalt not redeem; they are holy: their blood shalt thou sprinkle upon the altar, and their fat shalt thou burn as a fire-offering, for a sweet savor unto the Lord.

¹⁸And their flesh shall be thine: as the breast that is waved and as the right shoulder shall it be thine.

¹⁹All the heave-offerings of the holy things, which the children of Israel set apart unto the Lord, I have given to thee, and to thy sons and to thy daughters with thee, as a fixed portion for ever: it is a covenant of salt for ever before the Lord for thee and for thy seed with thee.

²⁰And the Lord said unto Aaron, In their land shalt thou have no inheritance, and any portion shalt thou not have among them: I am thy portion and thy inheritance among the children of Israel.

²¹And to the children of Levi, behold, I have given every tithe in Israel, for an inheritance, in lieu of their service which they render, the service of the tabernacle of the congregation.

²²And the children of Israel shall not henceforth come nigh unto the tabernacle of the congregation, to bear sin, to die thereby.