1 Kings 15:27

15:27 Baasha son of Ahijah, from the tribe of Issachar, conspired against Nadab and assassinated him in Gibbethon, which was in Philistine territory. This happened while Nadab and all the Israelite army were besieging Gibbethon.

1 Kings 16:15

Zimri’s Reign over Israel

16:15 In the twenty-seventh year of Asa’s reign over Judah, Zimri became king over Israel; he ruled for seven days in Tirzah. Zimri’s revolt took place while the army was deployed in Gibbethon, which was in Philistine territory.