Numbers 18:10

⁸And the Lord said to Aaron, And, behold, I have given you the charge of the firstfruits of all things consecrated to me by the children of Israel; and I have given them to thee as an honor, and to thy sons after thee for a perpetual ordinance.

⁹And let this be to you from all the holy things that are consecrated to me, even the burnt offerings, from all their gifts, and from all their sacrifices, and from every trespass offering of theirs, and from all their sin offerings, whatever things they give to me of all their holy things, they shall be thine and thy sons’.

— Numbers 18:10 —

¹¹And this shall be to you of the firstfruits of their gifts, of all the wave offerings of the children of Israel; to thee have I given them and to thy sons and thy daughters with thee, a perpetual ordinance; every clean person in thy house shall eat them.

¹²Every first offering of oil, and every first offering of wine, their firstfruits of corn, whatsoever they may give to the Lord, to thee have I given them.