1 Samuel 13:20

American King James Version (1999)

But all the Israelites went down to the Philistines, to sharpen every man his share, and his coulter, and his ax, and his mattock.

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And so did he in the cities of Manasseh, and Ephraim, and Simeon, even to Naphtali, with their mattocks round about.

Iron sharpens iron; so a man sharpens the countenance of his friend.

If I whet my glittering sword, and my hand take hold on judgment; I will render vengeance to my enemies, and will reward them that hate me.

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

Yet they had a file for the mattocks, and for the coulters, and for the forks, and for the axes, and to sharpen the goads.