Genesis 14:20

And blessed be the most high God — Note, In all our prayers we must praise God, and join hallelujahs with all our hosannas. These are the spiritual sacrifices we must offer up daily, and upon particular occasions. God as the most high God must have the glory of all our victories. In them he shews himself higher than our enemies, and higher than we, for without him we could do nothing. And he gave him tithes of all — That is, of the spoils, Hebrews 7:4. This may be looked upon, As a gratuity presented to Melchizedek, by way of return for his respects. As an offering dedicated to the most high God, and therefore put into the hands of Melchizedek his priest. Jesus Christ, our great Melchizedek, is to be humbly acknowledged by every one of us as our king and priest, and not only the tithe of all, but all we have, must be given up to him.