(ג) וַיְהִ֣י בְשָׁלֵ֣ם סֻכּ֑וֹ וּמְע֖וֹנָת֣וֹ בְצִיּֽוֹן׃
(1) And Malchitzedek king of Shalem – This is Jerusalem as it says, “His Tabernacle was in Shalem…” (Tehillim 76:3) And in the days of Yehoshua her king was also called “Adonitzedek” (Yehoshua 10:1) because from long ago the nations knew that site was the choicest of all places, located at the center of the settled world. Or they knew its value through received tradition, that it was aligned counter to the heavenly Temple where the Holy One’s Presence dwells, which is called “tzedek” (righteousness). In the midrash Bereshit Rabbah (43:6) it says this place makes its inhabitants righteous (matzdik) – Malchitzedek, Adonitzedek (Yehoshua 10:1). Jerusalem is called righteousness as it says, “…in which righteousness would lodge…” (Isaiah 1:21):
(יד) וַיִּקְרָ֧א אַבְרָהָ֛ם שֵֽׁם־הַמָּק֥וֹם הַה֖וּא יְהוָ֣ה ׀ יִרְאֶ֑ה אֲשֶׁר֙ יֵאָמֵ֣ר הַיּ֔וֹם בְּהַ֥ר יְהוָ֖ה יֵרָאֶֽה׃