Midrasch zu Mischlej 12:12

As he was about to cross the Nile, the tax-collectors gathered about him and asked: “What are you carrying in the cabinet?” “Barley,” he replied. They retorted: “It is not barley, but wheat.” “Then charge me the duty for wheat,” said he. “But it may be pepper,” they argued. “Then take the tax for pepper,” he insisted. They said to him: “It must be gold coins.” Finally, they compelled him to open the box. When they beheld her countenance, which was as radiant as the sun, they said to him: “Truly, she is not meant for a commoner.” And the princes of Pharaoh saw her, and praised her unto Pharaoh (Gen. 12:15). When Abraham saw this, he began to weep, and to supplicate the Holy One, blessed be He: “Master of the Universe, is this to be my reward for my abiding faith in You? For the sake of Your compassion and Your loving-kindness, do not put my trust in You to shame.” Sarah likewise cried out: “Master of the Universe, I knew nothing at all, but when he told me that you commanded him: Get thee out of thy country, I trusted in Your word. Now I have been separated from my father, my mother, and my husband, and this evil man will approach me and abuse me. Act for the sake of Your great name, and because of my trust in Your word.” The Holy One, blessed be He, replied: You may be certain that no harm will befall you or your husband, as it is written: There shall no mischief befall the righteous, but the wicked are filled with evil (Prov. 12:12).

"Rivka took the clothes of Esav, the fine ones (chamudot)" (Genesis 27:15) Those which he (Esav) chamad - coveted from Nimrod, and killed him and took them. That is the meaning of what is written (Proverbs 12:12) "The wicked covet the catch of evil men." "That were with her in the house" (Genesis 27:15) - for with them he (Esav) would serve his father. Rabbi Shimon son of Gamliel said: All my days, I served my father, but I did not serve him even one hundredth of the way Esav served his father. I, when would serve my father, I would serve him in dirty clothing, and when I would go out to travel, I would go out in clean clothing. But Esav, when he would serve his father, he would only serve him in royal clothes. He said, "It is only befitting of my father's honor for him to be served in royal clothes."