Malkitzedek Melech Shalem - Yerushalayim Ir Hatzedek

(1) ומלכי צדק מלך שלם, the word שלם is another word for ירושלים, and we find it referred to as such in Psalms 76,3 ויהי בשלם סכו, “Salem became His abode.” It was customary to give the title Malki Tzedek or Adoni Tzedek, to kings of Jerusalem in those days, just as the kings of Egypt were called Pharaoh. Compare Joshua 10,1 where we find אדני צדק מלך ירושלים. Jerusalem traditionally represented the center of righteousness and peace. It is a place in which iniquity is less tolerated than anywhere else. This is why the Torah warned in Leviticus 18,28 that the Israelites should take care that the land not spew them out just as it had spewed out previous inhabitants because they had defiled it. The reason the Torah in Deuteronomy 31,16 uses the somewhat enigmatic expression אלוהי נכר הארץ, is that the kind of conduct by the people in that city that were spewed out, was a conduct that was irreconcilable (alien) with the very nature, spiritual climate, prevailing in, and being part of that holy city. The sons of Korach already recognised and extolled this spiritual climate of the very city when they said in Psalms 48,3 יפה נוף משוש כל הארץ הר ציון ירכתי צפון קרית מלך רב, “fair-crested, joy of all the earth, Mount Zion, summit of Tzafon, city of the great King.” In the Midrash quoted by Rashi, Malki Tzedek is identified as Shem, the son of Noach.