NET
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.
Darby
15 In the twenty-seventh year of Asa king of Judah, Zimri reigned seven days in Tirzah. Now the people were encamped against Gibbethon, which [belonged] to the Philistines.
KJV
15 In the twenty and seventh year of Asa king of Judah did Zimri reign seven days in Tirzah. And the people [were] encamped against Gibbethon, which [belonged] to the Philistines.