And it shall be Aaron's and his sons' by a statute for ever from the children of Israel: for it is an heave offering: and it shall be an heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering to the LORD.
Thus you also shall offer an heave offering to the LORD of all your tithes, which you receive of the children of Israel; and you shall give thereof the LORD's heave offering to Aaron the priest.
Therefore you shall say to them, When you have heaved the best thereof from it, then it shall be counted to the Levites as the increase of the threshing floor, and as the increase of the wine press.