Numbers 18:19-21 Amplified Bible, Classic Edition (AMPC)

¹⁹ All the heave offerings [the lifted-out and kept portions] of the holy things which the Israelites give to the Lord I give to you and to your sons and your daughters with you, as a continual debt forever. It is a covenant of salt [that cannot be dissolved or violated] forever before the Lord for you [Aaron] and for your posterity with you.

²⁰ And the Lord said to Aaron, You shall have no inheritance in the land [of the Israelites], neither shall you have any part among them. I am your portion and your inheritance among the Israelites.

²¹ And, behold, I have given the Levites all the tithes in Israel for an inheritance in return for their service which they serve, the [menial] service of the Tent of Meeting.