It shall be for Aaron and his sons as a perpetual due from the people of Israel, for it is the priests' portion to be offered by the people of Israel from their peace offerings; it is their offering to the Lord.
So shall you also present an offering to the Lord from all your tithes, which you receive from the people of Israel; and from it you shall give the Lord's offering to Aaron the priest.
Therefore you shall say to them, ‘When you have offered from it the best of it, then the rest shall be reckoned to the Levites as produce of the threshing floor, and as produce of the wine press;