Proverbs 27:17

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

Iron sharpens iron; So a man sharpens his friend's countenance.

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

Iron by iron is sharpened, And a man sharpens the face of his friend.

As iron sharpens iron, so one man sharpens another.