Numbers 18:27-30

VIN(i) 27 "'Your contribution will be considered to be grain from the threshing floor or juice from the winepress. 28 Thus you also will offer a heave offering to the LORD of all your tithes, which you receive of the sons of Israel. And from it you will give the LORD's heave offering to Aaron the priest. 29 "‘Out of all the gifts you receive, you must contribute the best and holiest parts to the LORD.’ 30 "Also tell them: 'When you contribute the best part, your contribution will be considered to be produce from the threshing floor or winepress.