Rabbi Eleazar taught that Isaac's blindness, reported in was caused by his looking at the wicked Esau. But Rabbi Isaac taught that Abimelech's curse of Sarah caused her son Isaac's blindness. Rabbi Isaac read the words, "it is for you a covering ("kesut") of the eyes," in not as "kesut", "covering," but as "kesiyat", "blinding." Rabbi Isaac concluded that one should not consider a small matter the curse of even an ordinary person. Alternatively, a Midrash interpreted the words "his eyes were dim from seeing" in to teach that Isaac's eyesight dimmed as a result of his near sacrifice in for when Abraham bound Isaac, the ministering angels wept, as says, "Behold, their valiant ones cry without, the angels of peace weep bitterly," and tears dropped from the angels' eyes into Isaac's, leaving their mark and causing Isaac's eyes to dim when he became old.