The question of reputation and honour...
The question of reputation and honour, which is something vital for every society, enjoyed extraordinary importance amongst the Arabs and especially amongst the nomadic tribes who resorted to bloodshed on account of the slightest aspersion on their honour. The pitiable condition of the stranger women, therefore, aroused the sense of honour of a Muslim and he killed the Jewish goldsmith.
Naturally this act, committed in the area of the Jews themselves, could not pass without a reaction on their part. They therefore, attacked that Muslim en masse and put him to death. We are not concerned about the fact whether or not the killing of the Jew for his having insulted the woman conformed to principles and reason. However, a Muslim's having been attacked by hundreds of Jews collectively was decidedly very shocking.
Hence, the news of the tragic and pitiable murder of a Muslim stirred the moral sense of the Muslims, who determined to set the matters right and to destroy the centre of mischief. The reciters of epic verses of Bani Qaynqa' realized that the matter had become serious and it was no longer advisable for them to continue their business in the bazaars and streets of Madina.
They, therefore, considered it expedient to take refuge, as early as possible, in their houses, which were situated in high and strong forts, and to retreat there in spite of all their recitations of epic poems with great valour! They also committed a mistake in acting on this scheme. If they had regretted what they had done and had asked for forgiveness they would certainly have been able to reconcile with the Muslims on account of the forgiving nature of the Prophet.
However, to shut themselves in the forts was a sign of continuance of hostilities and enmity. The Prophet ordered the fort of the enemy to be besieged. The Muslim forces encircled the entire fort from one end to the other. The siege continued for fifteen days and entry of provisions into the fort was stopped. Any contact with those people was also prohibited. The Jews knelt down as a consequence of the economic blockade.
They opened the gate of the fort after making requisite signs, surrendered to the Muslim army. They also declared that the decision of the Prophet, whatever it was, should be adhered to. The Prophet intended to award severe punishment to the obstructionists and the opponents of political unity in Madina.