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.
and ye shall
Genesis 14:18 And Melchizedek king of Salem brought forth bread and wine: and he was the priest of the most high God.
Hebrews 6:20 Where the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec.
Hebrews 7:1-10 For this Melchisedec, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings...