Bede

And Saul said: I have sinned, etc. To David, who proposed two causes for his exile and inquired from Saul what was true, Saul himself, conscious of his own mind, responded that it was not by the Lord's incitement, but by his own foolishness that he had persecuted him. But now he begs him to return home, assuring that he will suffer no further harm from him. And many Jews, having confessed their crimes, took care to recall to themselves by faith the Lord whom they had driven away by their infidelity.

Commentary on Samuel ↗