II. What were the aggravations of their sin, v. 27. 1. That they were children of disobedience; for their first father (that is, their forefathers) had sinned; and they had not only sinned in their loins, but sinned like them. Ezra confesses this: Since the days of our fathers have we been in a great trespass, ch. ix. 7. But their forefathers are called their first father to put us in mind of the apostasy and rebellion of our first father Adam, to which corrupt fountain we must trace up the streams of all our transgressions. 2. That they were scholars of disobedience too: for their teachers had transgressed against God, were guilty of gross scandalous sins, and the people, no doubt, would learn to do as they did. It is ill with a people when their leaders cause them to err, and their teachers, who should reform them, corrupt them.