1 Samuel 14:21-22

²¹Now the Hebrews that were with the Philistines as beforetime, and that went up with them into the camp, [from the country] round about, even they also [turned] to be with the Israelites that were with Saul and Jonathan. ²²Likewise all the men of Israel that had hid themselves in the hill-country of Ephraim, when they heard that the Philistines fled, even they also followed hard after them in the battle.