And it shall be Aaron's and his sons' by a statute forever from the children of Israel: for it is a heave offering: and it shall be a heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering unto the LORD.
Thus you also shall offer a heave offering unto 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 unto them, When you have heaved the best thereof from it, then it shall be counted unto the Levites as the increase of the threshing floor, and as the increase of the winepress.