Numbers 18:27-30

CLV(i) 27 Your heave offering will be reckoned to you like the grain from the threshing site and like the fullness from the wine vat. 28 So shall you also raise up the heave offering of Yahweh from all your tithes which you take from the sons of Israel; and from it you will offer the heave offering of Yahweh to Aaron the priest. 29 From all your gifts you shall raise up the whole heave offering of Yahweh of all its best, its hallowed part, from it. 30 And you will say to them:When you raise up its best from it, then it will be reckoned to the Levites like the yield of the threshing site and like the yield of the wine vat.