The Rabbins say, that Melchizedek was Shem the son of Noah, who was king and priest to those that descended from him, according to the patriarchal model. Many Christian writers have thought that this was an appearance of the Son of God himself, our Lord Jesus, known to Abram at this time by this name. But as nothing is expressly revealed concerning it, we can determine nothing. He brought forth bread and wine — For the refreshment of Abram and his soldiers, and in congratulation of their victory. This he did as a king. As priest of the most high God he blessed Abram, which we may suppose a greater refreshment to Abram than his bread and wine were.
Related Commentaries of Genesis 14:18
Genesis 14:18
18 And Melchizedek king of Salem brought forth bread and wine: and he was the priest of the most high God.