“It was when Isaac was old, and his eyes dimmed from seeing, he summoned Esau his elder son, and said to him: My son, and he said to him: Here I am” (Genesis 27:1). “It was when Isaac was old” – Rabbi Yitzḥak began: “Those who exonerate the wicked due to [ekev] a bribe” (Isaiah 5:23) – anyone who takes a bribe and exonerates the wicked – ultimately.4He will ultimately be punished. “And remove the innocence of the righteous from him” (Isaiah 5:23) – “the innocence of the righteous” – this is Moses.5The Matnot Kehuna explains that Moses did not justify an evil person.
Rather he called the person who wanted to strike his friend an evil person. See Exodus 2:13. “Remove…from him” – this is Isaac. Because he exonerated the wicked,6He loved Esau. his eyes dimmed – “it was when Isaac was old, [and his eyes dimmed…].”