When the Philistines heard that the Israelites had gathered at Mizpah, their rulers marched up toward Israel. And when the Israelites learned of this, they feared the Philistines
KJV
And when the Philistines heard that the children of Israel were gathered together to Mizpeh, the lords of the Philistines went up against Israel. And when the children of Israel heard [it], they were afraid of the Philistines.
ASV
And when the Philistines heard that the children of Israel were gathered together to Mizpah, the lords of the Philistines went up against Israel. And when the children of Israel heard it, they were afraid of the Philistines.