The Portion of the Priests and Levites (Deuteronomy 18)

       Israel; they shall eat the offerings of the Lord made by fire, and His portion.  Therefore they shall have no inheritance among their brethren; the Lord is their inheritance, as He said to them.  And this shall be the priet's due from the people, from those who offer a sacfrifice, whether it is bull or sheep; they shall give to priest the shoulder, the cheeks, and the stomach.  The firstfruits of your grain and your new wine and your oil, and the first of the fleece of your sheep, you shall give to him.