Midrash su Salmi 45:13

Rabbi Simeon said: Abraham spake to Isaac his son (saying), This servant is suspected of all the transgressions of the Torah, and deceit is in this servant, as it is said, "He is a Canaanite, the balances of deceit are in his hand; he loveth to defraud" (Hos. 12:7). See, lest he has defiled her, therefore bring the girl into the tent and examine her tactually; || and if she be undefiled, behold, she is destined for thee from her mother's womb. He brought her into the tent and examined her tactually, and he showed the result to Abraham his father, and afterwards he took her to be his wife, as it is said, "And Isaac brought her into the tent of Sarah his mother… And Isaac was comforted after his mother's death" (Gen. 24:67); for the deeds of Rebecca were like unto those of Sarah. Hence the Israelites have the custom of producing the tokens of the damsel's virginity, as it is said, "Then shall the father of the damsel, and her mother, take and bring forth the tokens of the damsel's virginity" (Deut. 22:15).

And Malchitzedek king of Shalem – This is what is written “And the daughter of Tyre shall seek your presence with tribute, those who are the richest of the people.” (Tehillim 45:13) ‘Malchitzedek the king of Shalem’, 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) ‘king of Shalem’ R’ Yitzchak the Bavli says (he is called this) because he was born circumcised. "brought out bread and wine, and he was a priest to the Most High God" (Bereshit 14:18) R’ Shmuel bar Nachmani and the Rabbanan argue, R’ Shmuel said that the laws of the High Priesthood were revealed to him – ‘bread’ is the show bread, ‘wine’ are the libations. The Rabbanan say that Torah was revealed to him as it says, “"Come, partake of my bread and drink of the wine I have mingled.” (Mishle 9:5) ‘and he was a priest to the Most High God’ R’ Aba bar Kahana said every mention of wine written in the Torah makes an impact except for this, R’ Levi said that even this we did not escape, because from there He called upon him “…and they will enslave them and oppress them, for four hundred years.” (Bereshit 15:13)