1 Samuel 13:19-22

19Now there was no smith found throughout all the land of Israel: for the Philistines said, Lest the Hebrews make them swords or spears: 20But all the Israelites went down to the Philistines, to sharpen every man his share, and his coulter, and his axe, and his mattock. 21Yet they had a file for the mattocks, and for the coulters, and for the forks, and for the axes, and to sharpen the goads.12 22So it came to pass in the day of battle, that there was neither sword nor spear found in the hand of any of the people that were with Saul and Jonathan: but with Saul and with Jonathan his son was there found.