Midrash su Genesi 38:7

His master’s wife cast her eyes upon Joseph (Gen. 38:7). Scripture states elsewhere in allusion to this verse: Let their eyes be darkened, that they see not; and make their loins continually to totter (Ps. 69:24). You find that the righteous are exalted through their eyes, as it is said: And Abraham lifted his eyes and saw the place (Gen. 22:4); Abraham lifted his eyes and he saw, and behold, it was a ram (ibid., v. 13): and also: Abraham lifted his eyes, and looked, and lo, three men stood over against him (ibid. 18:2); Isaac lifted up his eyes, as is said: And Isaac went out to meditate in the field at eventide; and he lifted up his eyes (ibid. 24:63); and with regard to Jacob it likewise says: Jacob lifted up his eyes and looked, and behold, Esau came (ibid. 33:1). Wicked men, however, are degraded through their eyes, as it is said: And Lot lifted up his eyes and beheld all the plain of the Jordan (ibid. 13:10). This refers to Sodom, which had been previously selected by Abraham, but to which Lot went, and where he behaved as they did. That is why his name was Lot. For Lot means accursed (lut), and that is what happened to him. And Balak the son of Zippor saw (Num. 22:2), and he was also degraded through his eyes. You may explain every instance in which a wicked man saw in the same way.

His master’s wife cast her eyes upon Joseph (Gen. 38:7). Scripture states elsewhere in allusion to this verse: Death and life are in the power of the tongue; and they that indulge it shall eat the fruit thereof (Prov. 18:21). R. Hiyya the son of Abba declared: If a man should eat from a basket of figs without offering a blessing, death is in the power of the tongue, but if he should pronounce the blessing and then eat it, life is in the power of the tongue. All of the trials that befell Joseph occurred because of the evil he spoke against his brothers, as it is said: And Joseph brought evil report of them unto his father (Gen. 37:20).

And his father wept for him. After that Scripture states: The Midianites sold him into Egypt (Gen. 37:36). The Holy One, blessed be He, said to Judah: Until now you had no sons, and did not experience the grief caused by sons, but since you tormented your father, and deceived him with the words Joseph is without doubts torn to pieces (ibid., v. 33), by your life, you shall wed, bury your children,¹²His sons Er and Onan sinned grievously and were slain (see Gen. 38:7–10). and suffer the grief that comes with children.” What is written after this verse? Judah went down from his brethren … and he took her … and bore a son (ibid. 38:1–2). This teaches us that Judah became separated from his brothers. If at the time he had said to them: Come, let us sell him (ibid. 37:27), he had said instead: “Come, let us return him (to father),” they would have listened to him. Therefore, Judah went down. That is, he was deposed from his role as leader.