Numbers 18:16-22

¹⁶And his redemption shall be at the age of one month; thou shalt redeem with the price of five shekes, in the shekel of the sanctuary it is ten meahs:

¹⁷But the firstling of an ox, or of a sheep, or of a goat, thou mayest not redeem, they are consecrated; thou shalt sprinkle their blood upon the altar, and burn their fat, an oblation to be accepted before the Lord.

¹⁸But their flesh shall be for thee, as the breast of the elevation, and the right shoulder, they shall be thine.

¹⁹All the consecrated separations which the sons of Israel set apart before the Lord, I have given to thee and to thy children with thee by an everlasting covenant; an everlasting covenant of salt it is before the Lord, with thee, and thy children with thee.

²⁰And the Lord said to Aharon: In their land thou wilt not have possession, nor will thine be a portion among them; the gifts that I have given thee, they are thy portion and thy inheritance among the children of Israel.

²¹And to the sons of Levi, behold, I have given all the tenths in Israel for a possession, on account of the service with which they serve in the ministry of the tabernacle of ordinance.

²²But the children of Israel must no more come nigh to the tabernacle of ordinance, to contract guilt and to die.