When the Israelites give you one-tenth of everything that they own, then you must give the best and the holiest part of these things as your gift to the Lord.
In this way you will also give an offering to the Lord just as the other Israelites do. You will get the one-tenth that the Israelites give to the Lord, and then you will give one-tenth of that to Aaron the priest.
“Moses, tell this to the Levites: When you give the best part of what you receive to the Lord, it will be the same as grain from your own threshing floor and wine from your own winepress.
Tell them to bring your father and their families back here to me. I will give you the best land in Egypt to live on. And your family can eat the best food we have here.
The Israelites will always give Aaron and his sons these parts. These parts will always belong to the priests when the Israelites make an offering to the Lord. When they give these parts to the priest, it will be the same as giving them to the Lord.