1 Samuel 13:19-22

MLV(i) 19 Now there was no blacksmith found throughout all the land of Israel, for the Philistines said, Lest the Hebrews make for them swords or spears, 20 but all the Israelites went down to the Philistines to sharpen every man his share and his coulter and his axe and his mattock. 21 Yet they had a file for the mattocks and for the coulters and for the pitchforks and for the axes and to set the cattle-prods.
22 So it happened in the day of battle, that there was neither sword nor spear found in the hand of any of the people who were with Saul and Jonathan. But with Saul and with Jonathan his son there was found.