ٱلْحَدِيدُ بِٱلْحَدِيدِ يُحَدَّدُ، وَٱلْإِنْسَانُ يُحَدِّدُ وَجْهَ صَاحِبِهِ.
Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.