That David guy—a man after God's heart?

The history of lsrael’s kings illustrates the point. King David was guilty of the worst of crimes against humanity in the incident with Bathsheba and Uriah the Hittite (2 Sam 11). He was clearly in violation of the law and deserving of death. Nevertheless, his belief in who Yahweh was among all gods never wavered. God was merciful to him, sparing him from death, though his sin had consequences the rest of his life. But there was no doubt that David was ever a believer in Yahweh and never worshiped another. Yet other kings of Israel and Judah were tossed aside and both kingdoms sent into exile—because they worshiped other gods. Personal failure, even of the worst kind, did not send the nation into exile. Choosing other gods did.—Michael Heiser, The Unseen Realm, 170