法苑珠林 67.26

67.26

Fourth, there are also sentient beings whose two eyes are completely blind and without sight. Some bump into trees; some fall into ditches and pits. Having died, they receive yet another physical form just like this. What transgression caused this? The Buddha said: In their past lives, due to not believing in transgression and blessing, they obstructed the light of the Buddha, sewed shut the eyes of hawks, caged and bound sentient beings, or enclosed [beings'] heads in leather sacks so that they could not see. Therefore, they incurred this retribution.