John Calvin's Commentary on the Bible - Genesis 14:18
Verse 18 18.And Melchizedek king of Salem brought forth. This is the last of the three principal points of this history, that Melchizedek, the chief father of the Church, having entertained Abram at a feast, blessed him, in virtue of his priesthood, and received tithes from him. There is no doubt that by the coming of this king to meet him, God also designed to render the victory of Abram famous and memorable to posterity. But a more exalted and excellent mystery was, at the same time,... read more
Adam Clarke's Commentary on the Bible - Genesis 14:22
I have lift up mine hand - The primitive mode of appealing to God, and calling him to witness a particular transaction; this no doubt generally obtained among the faithful till circumcision, the sign of the covenant, was established. After this, in swearing, the hand was often placed on the circumcised part; see Genesis 24:2 , Genesis 24:9 . read more