Midrash su Genesi 36:43

“It was during the days of Aḥashverosh; that [hu] Aḥashverosh who reigned from India to Kush, one hundred and twenty-seven provinces” (Esther 1:1). Hu [appears] five [times] for evil, and five for good. Five for evil: “He [hu] was a mighty hunter”⁴Nimrod. (Genesis 10:9); “he is [hu] Esau, father of Edom” (Genesis 36:43); “this is [hu] Datan and Aviram” (Numbers 26:9); “he is [hu] King Aḥaz” (II Chronicles 28:22); “that [hu] Aḥashverosh” (Esther 1:1). Five for good: “Abram, he is [hu] Abraham” (I Chronicles 1:27); “that [hu] Aaron and Moses…that [hu] Moses and Aaron” (Exodus 6:26–27); “David was [hu] the youngest” (I Samuel 17:14); “he [hu], Yeḥizhiyahu” (II Chronicles 32:30); “he [hu], Ezra, came up from Babylon” (Ezra 7:6). Rabbi Berekhya said in the name of the Rabbis from there: We have one that is better than all of them: “He is [hu] the Lord our God; His judgments are throughout the land” (Psalms 105:7), whose attribute of mercy is forever.

The same Ahasuerus; i.e., he was the same in his wickedness from beginning to end. (Gen. 36, 43) This is Esau; i.e., the same in wickedness from beginning to end; (II Chr. 28, 22) He, King Ahaz; i.e., the same in wickedness always; and so is meant (Num. 26, 9) These are that Dathan and Abriam. And so it is also with the righteous (I Chr. 1, 27) Abram — the same is Abraham; i.e., Abraham was the same in righteousness from the beginning to the end; (Ex. 6, 26) These are that Aaron and Moses; i.e., they were the same in righteousness from beginning to end; (I Sam. 17, 14) And David was the youngest, that means he conducted himself from beginning to end, as in his youth; as in his youth he humbled himself before one greater than he in order to learn the Torah, so also when he was a king he was modest before a man superior to him in wisdom and tried to learn the Torah from him.

And Esau took all that his father had left, and he gave to Jacob the land of Israel, and the Cave of Machpelah, and they wrote a perpetual deed between them. Jacob said to Esau: Go from the land of my possession, from the land of Canaan. Esau took his wives, and his sons, and his daughters, and all that he had, [as it is said, "And Esau took his wives… and all his possessions which he had gathered in the land of Canaan], and went into a land away from his brother Jacob" (Gen. 36:6). And as a reward because he removed all his belongings on account of Jacob his brother, He gave him one hundred provinces from Seir unto Magdiel, and Magdiel is Rome, as it is said, "Duke Magdiel, Duke Iram" (Gen. 36:43).