101. But of those who as exiles and banished from their ancestral homes, which the holy law of Moses had assigned them, will be entangled in the errors of the world, you hear him saying: “By the waters of Babylon we sat down and wept, when we remembered Zion.” Ps. cxxxvii. [cxxxvi.] 1. He sets forth the wailings of those who have fallen, and shows that they who are living in this condition of passing time and changing circumstances ought to repent, after the example of those who, as a reward for sin, had been led into miserable captivity.