'Seventh Year' in the Bible

Zimri went inside, attacked him, and killed him in the twenty-seventh year of the reign of King Asa of Judah, and then became king in Elah's place.

Zimri reigned for seven days at Tirzah during the twenty-seventh year of the reign of King Asa of Judah. At that time, the army was encamped in a siege against Gibbethon of Philistia.