When all the Israelites who had been hiding in the hill country of Ephraim heard that the Philistines were fleeing, they also joined the battle in close pursuit.
We have here the prosecution and improvement of the wonderful advantages which Jonathan and his armour-bearer gained against the Philistines. I. The Philistines were, by the power of God, set against one another. They melted away like snow before the sun, and went on beating down one another (Sa1 14:16), for (Sa1 14:20) every man's sword was against his fellow.
Commenting on 1 Samuel 14:16-23
Likewise all the men of Israel which had hid themselves in Mount Ephraim,.... In the caves and rocks, thickets and pits there, see Sa1 13:6 when they heard that the Philistines fled; now being delivered from their fears, and thinking themselves safe, ventured out of their lurking places: even they also followed hard after them in the battle; they joined the pursuers who came their...
The men - which had hid themselves - See Sa1 13:6. The Vulgate and the Septuagint add here, And there were with Saul about ten thousand men; but this is supported by no other authority.