Amon, the son of Manasseh, surpassed his father in wickedness. He was in the habit of saying: "My father was a sinner from early childhood, and in his old age he did penance. I shall do the same. First I shall satisfy the desires of my heart, and afterward I shall return to God." Indeed, he was guilty of more grievous sins than his predecessor; he burned the Torah; under him the place of the altar was covered with spiderwebs; and, as though of purpose to set at naught the Jewish religion, he committed the worst sort of incest, a degree more heinous than his father's crime of a similar nature. Thus he executed the first half of his maxim literally. For repentance, however, he was given no time; death cut him off in the fulness of his sinful ways.
Kingdom of Amon
Legends of the Jews 9:48