Numbers 18:24-27

²⁴But be content with the oblation or tithes, which I have separated for their uses and necessities.

²⁵And the Lord spoke to Moses, saying:

²⁶Command the Levites, and declare unto them: When you shall receive of the children of Israel the tithes, which I have given you, offer the firstfruits of them to the Lord, that is to say, the tenth part of the tenth:

²⁷That it may be reckoned to you as an oblation of firstfruits, as well of the barnfloors as of the winepresses: