Narrated Umar ibn al-Khattab:
Al-Aqra', the mu'adhdhin (announcer) of Umar ibn al-Khattab said: Umar sent me to a bishop and I called him.
Umar said to him: Do you find me in the Book?He said: Yes.He asked: How do you find me?He said: I find you (like a) castle.Then he raised a whip to him, saying: What do you mean by castle?He replied: An iron castle and severely trustworthy.He asked: How do you find the one who will come after me?He said: I find him a pious caliph, except that he will prefer his relatives.Umar said: May Allah have mercy on Uthman: He said it three times. He then asked: How do you find the one who will come after him?
He replied: I find him like rusty iron.Umar then put his hand on his head, and said: O filthy! O filthy!He said: Commander of the Faithful! He is a pious caliph, but when he is made caliph, the sword will be unsheathed and blood will be shed.
Abu Dawud said: Al-dafr means filth or evil smell.
