וּמַלְכִּי־צֶ֙דֶק֙ מֶ֣לֶךְ שָׁלֵ֔ם הוֹצִ֖יא לֶ֣חֶם וָיָ֑יִן וְה֥וּא כֹהֵ֖ן לְאֵ֥ל עֶלְיֽוֹן׃
살렘 왕 멜기세덱이 떡과 포도주를 가지고 나왔으니 그는 지극히 높으신 하나님의 제사장이었더라
Rashi
ומלכי צדק AND MELCHIZEDEK — A Midrashic explanation is that he is identical with Shem, son of Noah (Nedarim 32b).
Chizkuni
הוציא לחם ויין, “he produced (from his satchel) bread and wine;” the rules of syntax would have demanded that the verses 1718 should have been written in the following sequence: “The king of Sodom came out of hiding to meet Avram after he had defeated the 4 most powerful kings, and he said to Avram: “hand me over the human beings and keep the chattels for yourself.” (verse 22). Instead, the Torah interrupted with the arrival of Malki Tzedek and his blessing Avram. The reason that the Torah interrupted with verses 1821 was that it wanted to put Avraham’s refusing any offer from the King of Sodom into proper context. If the Torah had inserted the words of Avram, saying that he would not even accept a shoelace so that the King of Sodom could not say that he had personally contributed to Avram’s material wealth, the world would have wondered how Avram could have paid the wages of his soldiers. After reading that Avram had first given ten per cent of all the loot to Malki Tzedek who represented the only G-d, they would not ask such questions. They had also learned that Avram did not mind accepting bread and wine from Malki Tzedek who had acquired all which he possessed by morally acceptable means. They realised that Avram shied away not from material possessions as such, but only from material possessions not acquired by morally and ethically acceptable means. An alternate exegesis: Malki Tzedek produced bread and wine which had not been tithed in order to give Avram an opportunity to perform that commandment, as we will explain on verse 20.
Da'at Zekenim
ומלכי צדק מלך שלם הוציא לחם ויין, “and Malki Tzedek, King of Shalem, produced bread and wine, etc.” This was the custom in which soldiers returning from battle would be welcomed. They were naturally tired and worn out, and needed to replace spent energy by imbibing drink and consuming food. An alternate explanation: the reference to bread and wine, specifically, is a hint that just as that King was a priest, so priests of the Jewish people would perform temple service offering libations of wine and the showbreads to the Almighty on a regular basis. In this instance Malki Tzedek, up to now a priest of the supreme G–d, forfeited that honour when he blessed Avraham before first blessing the Almighty, Who had enabled Avraham to become the victor. When David, in Psalms 110,4 said: נשבע ה' ולא ינחם אתה כהן לעולם על דברתי מלכי צדק, “the Lord has sworn and will not relent, ’you are a priest forever, a rightful priest by My decree,’” he referred to the incident in our verse which cost Malki Tzedek his priesthood. [All the people killed in that battle were actually killed by G–d, as a priest who has killed a human being is forthwith denied the right to perform service in the Temple. Abraham certainly had represented the priesthood in his age. He was “officially” appointed as such after this incident. Ed.] According to the Talmud in Nedarim 32, quoted earlier, this is all derived from the word כהן, “a priest,” which our sages understand to mean that his offspring were not priests.