Midrash su Genesi 32:19

“Wisdom is better than instruments of battle, and one sinner destroys much good” (Ecclesiastes 9:18).
“Wisdom is better than instruments of battle” – this is the wisdom of Jacob; “than instruments of battle” – of Esau the wicked. Rabbi Levi said: He armed them¹¹¹Jacob armed his sons and the other members of his camp. with weapons on the inside and dressed them in white garments on the outside, and he prepared himself for three matters: for prayer, for a gift, and for war. For prayer, from where is it derived? As it is stated: “Please rescue me from the hand of my brother” (Genesis 32:12). For a gift, from where is it derived? As it is stated: “You shall say: From your servant Jacob, it is a gift sent” (Genesis 32:19). For war, from where is it derived? As it is stated: “He placed the maidservants [and their children first, and Leah and her children next, and Rachel and Joseph last.] He passed before them and prostrated himself earthward” (Genesis 33:2–3). He said: It is preferable that he harm me and not my children.¹¹²Thus, Jacob was prepared for the fact that Esau might act violently upon their encounter. “Esau returned on that day on his way to Se’ir” (Genesis 33:16). Why to Se’ir? Rabbi Elazar and Rabbi Shmuel bar Naḥmani, Rabbi Elazar said: It was due to a promissory note.¹¹³The descendants of Isaac were to receiv the Land of Israel and were to be enslaved in Egypt. Esau preferred to forgo the Land of Israel and forgo the enslavement in Egypt. The midrash refers to the coming enslavement as though it were a debt set forth in a promissory note. Rabbi Shmuel said: It was due to shame.¹¹⁴He was ashamed for having sold his birthright. “And one sinner destroys much good” – this is Esau who lost all the goodness and the gifts of the World to Come.