מדרש אויף יהושע 10:1

And it is written: “I will place a mark of leprosy.” Rabbi Ḥiyya taught: Is this good tidings for them, that leprosy will befall them? Rabbi Shimon ben Yoḥai taught: When the Canaanites heard that Israel was coming upon them, they arose and concealed their money in the houses and in the fields. The Holy One blessed be He said: ‘I promised their ancestors that I will take their descendants into a land full of everything good,’ as it is stated: “Houses full of everything good” (Deuteronomy 6:11). What does the Holy One blessed be He do? He brings leprosy in one’s house, and [the owner] demolishes it and finds the concealed cache.
Who came and told the Canaanites that Israel was entering the land? Rabbi Yishmael bar Naḥman said: Joshua sent three missives to them. One who wishes to evacuate, let him evacuate. One who wishes to make peace, let him make peace. One who wishes to wage war, let him do so. The Girgashite stood and evacuated; therefore they were given a land as fine as their [previous] land. That is what is written: “Until I arrive and take you to a land like your land” (Isaiah 36:17); this is Africa. The Givonites made peace, as it is stated: “That the inhabitants of Givon had made peace” (Joshua 10:1). The thirty-one kings waged war and were defeated.

“Malkitzedek king of Salem took out bread and wine, and he was a priest of God, the Most High” (Genesis 14:18).
“Malkitzedek king of Salem…” – that is what is written: “Daughter of Tzor, the wealthiest of the people will seek your favor with gifts” (Psalms 45:13).²⁵The “daughter of Tzor” refers to Abraham, who distressed (hetzer) the four kings, and who was distressed by them. “The wealthiest of the people,” referring to Malkitzedek king of Salem, “will seek your favor with gifts,” as he did in this verse (Yalkut Shimoni).
“Malkitzedek king of Salem” – this place²⁶Salem is short for Jerusalem (see Psalms 76:3). renders its inhabitants righteous, [and this is why he was called] Malkitzedek,²⁷Malkitzedek means king of righteousness [tzedek]. [and we find as well] “Adoni Tzedek [king of Jerusalem]” (Joshua 10:1).²⁸Adoni Tzedek means “lord of righteousness.” Jerusalem itself is called righteousness [tzedek], as it is stated: “Justice [tzedek] abided in it” (Isaiah 1:21).²⁹See also Isaiah 1:26.
“King of Salem [Shalem]” – Rabbi Yitzḥak the Babylonian says: He was born circumcised.³⁰Melekh shalem, translated earlier “king of Salem,” can also mean “the perfect king,” meaning that he was born in a perfected state, having had no need for circumcision.
“[He] took out bread and wine, and he was a priest of God, the Most High” – Rabbi Shmuel bar Naḥman and the Rabbis, Rabbi Shmuel said: He revealed to him the laws of the High Priesthood.³¹Malkitzedek brought bread and wine in order to show Abraham the priestly rites involving these items. “Bread” – this alludes to the showbread;³²Described in Leviticus 24:5–9. “and wine” – this alludes to the libations. The Rabbis say: He revealed Torah [precepts] to him, as it is stated: “Come, partake of my bread, and drink of the wine that I have mixed” (Proverbs 9:5).³³The speaker in this verse is divine wisdom, the Torah. It refers to its teachings metaphorically as bread and wine.
“And he was a priest of God, the Most High” – Rabbi Abba bar Kahana and Rabbi Levi, Rabbi Abba bar Kahana said: Any time wine is written in the Torah it connotes a [negative] impact,³⁴As when Noah (Genesis 9:21) and Lot (Genesis 19:32–35) became drunk, both instances leading to humiliating consequences. except for this one. Rabbi Levi said: We cannot except this one either, as it was immediately after this that He decreed upon him: “They³⁵Abraham’s descendants. will be enslaved to them and they will oppress them” (Genesis 15:13).