Zimri

Zimri was the fifth king of the northern kingdom of Israel, who held power for only seven days around 885 BC—the shortest reign of any Israelite king. A commander of half the royal chariots, he murdered King Elah during a drinking party and seized the throne (1 Kings 16:9–10). He immediately killed every male member of the house of Baasha, fulfilling the prophecy of Jehu (1 Kings 16:11–13). When the army besieging Gibbethon heard what he had done, they proclaimed their own commander Omri king; Omri marched on Tirzah, and when Zimri saw the city was lost, he set the palace on fire and died in the flames (1 Kings 16:17–18). His seven-day reign became proverbial, and his name was later used as a byword for treachery (2 Kings 9:31).