Numbers 18:30-32

New Revised Standard Version, Anglicised

³⁰ Say also to them: When you have set apart 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. ³¹ You may eat it in any place, you and your households; for it is your payment for your service in the tent of meeting. ³² You shall incur no guilt by reason of it, when you have offered the best of it. But you shall not profane the holy gifts of the Israelites, on pain of death.