Numbers 18:6-8

Modern English Version

⁶ I Myself have taken your brothers, the Levites, from among the children of Israel; they are given to you as a gift from the Lord to perform the service of the tent of meeting. ⁷ And you and your sons with you will attend to your priesthood for everything at the altar, and within the veil, and you will serve. I have given your priesthood to you as a gift service, and the foreigner that comes near will be put to death.

Offerings for Priests and Levites

⁸ The Lord spoke to Aaron: I have certainly given you the charge of the offerings made to Me, all the hallowed gifts of the children of Israel. To you and to your sons have I given them as a portion, as an ordinance forever.