Numbers 19:1
The Red Heifer The Lord spoke to Moses and Aaron. He said:
You will not be guilty of any sin because of this as long as you have presented the best part to the Lord. You will not eat any gifts before the best part is offered. In this way, you will not defile the sacred gifts of the Israelites, and you will not die.”
You may eat them anywhere, you and your families: this is your payment for serving in the Tent of Meeting.
This best part that the Levites set aside shall be credited to you as an offering of the threshing floor and the wine press.
Thus, you too will set aside a share for the Lord of all the tithes you receive from the Israelites, and you will give to Aaron, the priest, this part you have set aside for the Lord.
This will replace the offerings of new grain and new wine that everyone is required to give me.
“You are to say to the Levites: When you receive the tithe that the people of Israel must pay and which I am giving you as your inheritance, you are to set aside a part of this as a special contribution for the Lord.