Zimri

Zimri (the name means praiseworthy), chariot commander who murdered king Elah at Tirzah[?], and succeeded him on the throne of Israel. He reigned only seven days, because Omri, whom the army elected as king, laid siege to Tirzah, whereupon Zimri set fire to the palace and perished amid its ruins. Omri succeeded to the throne only after four years of fierce war with Tibni, another claimant to the throne.

The story is told in the Books of Kings, (1 Kings, Chapter 16).