1 Kings 16:23

Began Omri to reign over Israel twelve years, i.e. and he reigned twelve years, not from this thirty-first year of Asa, for he died in his thirty-eighth year, 1 Kings 16:29; but from the beginning of his reign, which was in Asa's twenty-seventh year, 1 Kings 16:15,16. So he reigned four years in a state of war with Tibni, and eight years peaceably.