1 Samuel 13:19-22

Now no blacksmith (metal-worker) could be found in all the land of Israel, for the Philistines said, “Otherwise the Hebrews will make swords or spears.” So all [the men of] Israel went down to the Philistines, each to get his plowshare, pick, axe, or sickle sharpened. The fee [for sharpening] was a pim (two-thirds of a shekel) for the plowshares, the picks, the pitchforks, and the axes, and to straighten the goads (cattle prods). So it came about on the day of battle that neither sword nor spear was found in the hands of any of the people who were with Saul and Jonathan; but Saul and Jonathan his son had them.