Regarding the Verse:-- "Then what is the matter with you that you are divided into two parties about the hypocrites?" (4.88) Some of the companions of the Prophet returned from the battle of Uhud (i.e. refused to fight) whereupon the Muslims got divided into two parties; one of them was in favor of their execution and the other was not in favour of it. So there ware revealed: "Then what is the matter with you that you are divided into two parties about the hypocrites?" (4.88). Then the Prophet said "It (i.e. Medina) is aTayyaboh (good), it expels impurities as the fire expels the impurities of silver."

A bedouin came to the Prophet and said, "Please take my Pledge of allegiance for Islam." So the Prophet took from him the Pledge of allegiance for Islam. He came the next day with a fever and said to the Prophet "Cancel my pledge." But the Prophet refused and when the bedouin went away, the Prophet said, "Medina is like a pair of bellows (furnace): It expels its impurities and brightens and clears its good."

A bedouin came to the Prophet and gave a pledge of allegiance for embracing Islam. The next day he came with fever and said (to the Prophet ), "Please cancel my pledge (of embracing Islam and of emigrating to Medina)." The Prophet refused (that request) three times and said, "Medina is like a furnace, it expels out the impurities (bad persons) and selects the good ones and makes them perfect."

A bedouin gave the Pledge of allegiance to Allah's Apostle for Islam and the bedouin got a fever where upon he said to the Prophet "Cancel my Pledge." But the Prophet refused. He came to him (again) saying, "Cancel my Pledge.' But the Prophet refused. Then (the bedouin) left (Medina). Allah's Apostle said: "Medina is like a pair of bellows (furnace): It expels its impurities and brightens and clears its good."

When the Prophet set out for (the battle of) Uhud, some of those who had gone out with him, returned. The companions of the Prophet were divided into two groups. One group said, "We will fight them (i.e. the enemy)," and the other group said, "We will not fight them." So there came the Divine Revelation:-- '(O Muslims!) Then what is the matter within you that you are divided. Into two parties about the hypocrites? Allah has cast them back (to disbelief) Because of what they have earned.' (4.88) On that, the Prophet said, "That is Taiba (i.e. the city of Medina) which clears one from one's sins as the fire expels the impurities of silver."

A bedouin gave the Pledge of allegiance for embracing Islam to Allah's Apostle, and then he got an attack of fever in Medina and came to Allah's Apostle: and said, "O Allah's Apostle! Cancel my pledge." Allah's Apostle refused to do so. The bedouin came to him again and said, "Cancel my pledge," but he refused again, and then again, the bedouin came to him and said, "Cancel my pledge," and Allah's Apostle refused. The bedouin finally went away, and Allah's Apostle said, "Medina is like a pair of bellows (furnace), it expels its impurities while it brightens and clears its good.'

A bedouin gave the Pledge of allegiance to Allah's Apostle for Islam. Then the bedouin got fever at Medina, came to Allah's Apostle and said, "O Allah's Apostle! Cancel my Pledge," But Allah's Apostle refused. Then he came to him (again) and said, "O Allah's Apostle! Cancel my Pledge." But the Prophet refused Then he came to him (again) and said, "O Allah's Apostle! Cancel my Pledge." But the Prophet refused. The bedouin finally went out (of Medina) whereupon Allah's Apostle said, "Medina is like a pair of bellows (furnace): It expels its impurities and brightens and clears its good.

Yahya related to me from Malik from Muhammad ibn al-Munkadir from Jabir ibn Abdullah that a Bedouin took an oath of allegiance in Islam with the Messenger of Allah, may Allah bless him and grant him peace. A fever befell the Bedouin at Madina. He came to the Messenger of Allah, and said, "Messenger of Allah, release me from my pledge." The Messenger of Allah, may Allah bless him and grant him peace, refused. Then he came to him again and said, "Release me from my pledge." The Messenger of Allah may Allah bless him and grant him peace, refused. Then he came again and said, "Release me from my pledge." He refused. Then he came again and said, "Release me from my pledge." He refused. The Bedouin left and the Messenger of Allah, may Allah bless him and grant him peace, said, "Madina is like the blacksmith's furnace. It removes the impurities and purifies the good."

When the Prophet went out for (the battle of) Uhud, some of his companions (hypocrites) returned (home). A party of the believers remarked that they would kill those (hypocrites) who had returned, but another party said that they would not kill them. So, this Divine Inspiration was revealed: "Then what is the matter with you that you are divided into two parties concerning the hypocrites." (4.88) The Prophet said, "Medina expels the bad persons from it, as fire expels the impurities of iron."

Allah's Apostle said, "I was ordered to migrate to a town which will swallow (conquer) other towns and is called Yathrib and that is Medina, and it turns out (bad) persons as a furnace removes the impurities of iron.

Malik related to me that Yahya ibn Said said, "I heard Abu'l-Hubab Said ibn Yasar say that he heard Abu Hurayra say that he heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'I was ordered to a town which will eat up towns. They used to say, 'Yathrib,' but it is Madina. It removes the bad people like the blacksmith's furnace removes impurities from the iron.' "

Another chain reports a similar hadith.

The above (No 868) tradition has also been reported through a different chain of narrators by Uqbah ibn Amir to the same effect. This version adds: When the Messenger of Allah (saws) bowed, he said: "Glory and praise be to my mighty Lord" three times, and when he prostrated himself, he said: "Glory and praise be to my most high Lord" three times.

Abu Dawud said: We are afraid the addition of the word "praise" is not guarded.