Genesis 14:20 - Matthew Poole's English Annotations on the Holy Bible

Not Melchizedek gave to Abram, as some Jews foolishly understand it; for Abram swears that he would not keep nor take any of the recovered goods of the kings of Sodom, or his brethren, Genesis 14:23. But Abram gave to Melchizedek, as appears both from Hebrews 4:7, and from the nature of the thing, for the tithes confessedly belong to the priest, such as Melchizedek, and not Abram, is here described to be. All, not of all the recovered goods, but of all the spoils taken from the enemies.