Numbers 18:24-27

²⁴They shall wield none other thing, and they shall be satisfied with the offering of tithes, which I separated into the uses and necessaries of them. (They shall possess nothing else, and they shall be satisfied with the offering of the tithes which I set apart for their uses and their necessities.)

²⁵And the Lord spake to Moses and said,

²⁶Command thou, and announce to the deacons, When ye have taken tithes of the sons of Israel, which I gave to you, offer ye the first fruits of those to the Lord, that is, the tenth part of the tenth, (Command thou, and say to the Levites, When ye have received the tithes of the Israelites, which I gave to you, offer ye the first fruits of those tithes to the Lord, that is, a tithe of the tithe,)

²⁷that it be areckoned to you into the offering of the first fruits, as well of the cornfloors, as of the presses; (so that it shall be counted for you as though it be an offering of the first fruits, yea, from the threshing floor, and from the winepress;)