I Samuel 13:16–23

And Saul, and Jonathan his son, and the people that were present with them, were in Gabaa of Benjamin: But the Philistines encamped in Machmas. 17And there went out of the camp of the Philistines three companies to plunder. One company went towards the way of Ephra to the land of Sual; 18And another went by the way of Bethoron, and the third turned to the way of the border, above the valley of Seboim towards the desert. 19Now there was no smith to be found in all the land of Israel, for the Philistines had taken this precaution, lest the Hebrews should make them swords or spears. 20So all Israel went down to the Philistines, to sharpen every man his ploughshare, and his spade, and his axe, and his rake. 21So that their shares, and their spades, and their forks, and their axes, were blunt, even to the goad, which was to be mended. 22And when the day of battle was come, there was neither sword nor spear found in the hand of any of the people that were with Saul and Jonathan, except Saul and Jonathan his son. 23And the army of the Philistines went out in order to advance further in Machmas.