¹⁷ Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.

¹⁷ Iron is sharpened by iron; so a man sharpeneth the countenance of his friend.

¹⁷ Iron makes iron sharp; so a man makes sharp his friend.

¹⁷ As iron sharpens iron, so a friend sharpens a friend.

¹⁷ You use steel to sharpen steel, and one friend sharpens another.