I Samuel 13:19 Midrash

וְחָרָשׁ֙ לֹ֣א יִמָּצֵ֔א בְּכֹ֖ל אֶ֣רֶץ יִשְׂרָאֵ֑ל כִּֽי־אמר [אָמְר֣וּ] פְלִשְׁתִּ֔ים פֶּ֚ן יַעֲשׂ֣וּ הָעִבְרִ֔ים חֶ֖רֶב א֥וֹ חֲנִֽית׃

Now there was no smith found throughout all the land of Israel; for the Philistines said: ‘Lest the Hebrews make them swords or spears’;