Numbers 18:19-21 Tree of Life Version (TLV)
19 Whatever is set aside from the holy offerings which Bnei-Yisrael present to Adonai, I have given to you, your sons and your daughters with you as a permanent share. It is an everlasting covenant of salt before Adonai for you and your offspring.”
20 Adonai said to Aaron, “You will have no inheritance in their land nor share among them. I am your portion and your share among Bnei-Yisrael. 21 See, I have given all the tithes in Israel to the sons of Levi as an inheritance in return for all the work of the service they are doing in the Tent of Meeting.