Numbers 18:29

26 `And unto the Levites thou dost speak; and thou hast said unto them, When ye take from the sons of Israel the tithe which I have given to you from them, for your inheritance, then ye have lifted up from it the heave-offering of Jehovah, a tithe of the tithe;

27 and your heave-offering hath been reckoned to you as corn from the threshing-floor, and as fulness from the wine-vat;

28 so ye do lift up--ye also--the heave-offering of Jehovah from all your tithes which ye receive from the sons of Israel; and ye have given from it the heave-offering of Jehovah to Aaron the priest;

29 out of all your gifts ye do lift up the whole heave-offering of Jehovah; out of all its fat, --its hallowed part--out of it.

30 `And thou hast said unto them, In your lifting up its fat out of it, then it hath been reckoned to the Levites, as increase of a threshing-floor, and as increase of a wine-vat;

31 and ye have eaten it in every place, ye and your households, for it is your hire in exchange for your service in the tent of meeting;

32 and ye bear no sin for it, in your lifting up its fat out of it, and the holy things of the sons of Israel ye do not pollute, and ye die not.'