"The Jews must bear their expenses and the Muslims their expenses. Each must help the other against anyone who attacks the people of this document. They must seek mutual advice and consultation, and loyalty is a protection against treachery. They shall sincerely wish one another well. Their relations will be governed by piety and recognition of the rights of others, and not by sin and wrongdoing. The wronged must be helped. The Jews must pay with the believers so long as the war lasts. Yathrib shall be a sanctuary for the people of this document. If any dispute or controversy likely to cause trouble should arise, it must be referred to God and to Muhammad the Apostle of God; Quraish and their helpers shall not be given protection. The contracting parties are bound to help one another against any attack on Yathrib; Every one shall be responsible for the defence of the portion to which he belongs" (lbn Hisham, vol. ii, pp. 147 to 150).

This was on absolute and definitive covenant to the conditions of which the Jews themselves had agreed. But not very long after this they began to show hostility towards the Holy Prophet of Allah (upon whom be Allah's peace) and Islam and the Muslims, and their hostility and perverseness went on increasing day by day. Its main causes were three:

First, they envisaged the Holy Prophet (upon whom be Allah's peace) merely as a chief of his people, who should be content to have concluded a political agreement with them and should only concern himself with the worldly , interests of his group. But they found that he was extending an invitation to belief in Allah and the Apostleship and the Book (which also included belief in their own Prophets and scriptures), and was urging the people to give up disobedience of Allah and adopt obedience to the Divine Commands and abide by the moral laws of their own prophets. This they could not put up with. They feared that if this universal ideological movement gained momentum it would destroy their rigid religiosity and wipe out their racial nationhood.

Second, when they saw that the Aus and the Khazraj and the Emigrants were uniting into a brotherhood and the people from the Arab tribes of the surrounding areas, who entered Islam, were also joining this Islamic Brotherhood of Madinah and forming a religious community, they feared that the selfish policy that they had been following of sowing discord between the Arab tribes for the promotion of their own well being and interests for centuries, would not work in the new system, but they would face a united front of the Arabs against which their intrigues and machinations would not succeed.

Third, the work that the Holy Messenger of Allah (upon whom be Allah's 'peace) was carrying out of reforming the society and civilization included putting an end to all unlawful methods" in business and mutual dealings. More than that; he had declared taking and giving of interest also as impure and unlawful earning. This caused them the fear that if his rule became established in Arabia, he would declare interest legally forbidden, and in this they saw their own economic disaster and death.

For these reasons they made resistance and opposition to the Holy Prophet their national ideal. They would never hesitate to employ any trick and machination, any device and cunning, to harm him. They spread every kind of falsehood so as to cause distrust against him in the people's minds. They created every kind of doubt, suspicion and misgiving in the hearts of the new converts so as to turn them back from Islam. They would make false profession of Islam and then would turn apostate so that it may engender more and more misunderstandings among the people against Islam and the Holy Prophet (upon whom be Allah's peace). They would conspire with the hypocrites to create mischief and would cooperate with every group and tribe hostile to Islam. They would create rifts between the Muslims and would do whatever they could to stir them up to mutual feuds and fighting. The people of the Aus and the Khazraj tribes were their special target, with whom they had been allied for centuries. Making mention of the war of Buath before them they would remind them of their previous enmities so that they might again resort to the sword against each other and shatter their bond of fraternity into which Islam had bound them. They would resort to every kind of deceit and fraud in order to harm the Muslims economically. Whenever one of those with whom that had business dealings, would accept Islam, they would do whatever they could to cause him financial loss. If he owed them something they would worry and harass him by making repeated demands, and if they owed him something, they would withhold the payment and would publicly say that at the time the bargain was made he professed a different religion, and since he had changed his religion, they were no longer under any obligation towards him. Several instances of this nature have been cited in the explanation of verse 75 of Surah Al Imran given in the commentaries by Tabari, Nisaburi, Tabrisi and in Ruh al Ma'ani.

They had adopted this hostile attitude against the covenant even before the Battle of Badr. But when the Holy Prophet (upon whom be Allah's peace) and the Muslims won a decisive victory over the Quraish at Badr, they were filled with grief and anguish, malice and anger. They were in fact anticipating that in that war the powerful Quraish would deal a death blow to the Muslims. That is why even before the news of the Islamic victory reached Madinah they had begun to spread the rumor that the Holy Prophet (upon whom be Allah's peace) had fallen a martyr and the Muslims had been routed, and the Quraish army under Abu Jahl was advancing on Madinah. But when the battle was decided against their hopes and wishes, they burst with anger and grief. Ka'b bin Ashraf, the chief of the Bani an-Nadir, cried out:"By God, if Muhammad has actually killed these nobles of Arabia, the earth's belly would be better for us than its back." Then he went to Makkah and incited the people to vengeance by writing and reciting provocative elegies for the Quraish chiefs killed at Badr. Then he returned to Madinah and composed lyrical verses of an insulting nature about the Muslim women. At last, enraged with his mischief, the Holy Prophet (upon whom be Allah's peace) sent Muhammad bin Maslamah Ansari in Rabi al-Awwal, A. H. 3, and had him slain. (Ibn Sad, Ibn Hisham, Tabari).

The first Jewish tribe which, after the Battle of Badr, openly and collectively broke their covenant were the Bani Qainuqa. They lived in a locality inside the city of Madinah. As they practised the crafts of the goldsmith, blacksmith and vessel maker, the people of Madinah had to visit their shops fairly frequently. They were proud of their bravery and valor. Being blacksmiths by profession even their children were well armed, and they could instantly muster 700 fighting men from among themselves. They were also arrogantly aware that they enjoyed relations of confederacy with the Khazraj and Abdullah bin Ubbay, the chief of the, Khazraj, was their chief supporter. At the victory of Badr, they became so provoked that they began to trouble and harass the Muslims and their women in particular, who visited their shops. By and by things came to such a pass that one day a Muslim woman was stripped naked publicly in their bazaar. This led to a brawl in which a Muslim and a Jew were killed. Thereupon the Holy Prophet (upon whom be Allah's peace) himself visited their locality, got them together and counseled them on decent conduct. But the reply that they gave was; "O Muhammad, you perhaps think we are like the Quraish; they did not know fighting; therefore, you overpowered them. But when you come in contact with us, you will see how men fight."This was in clear words a declaration of war. Consequently, the Holy Prophet (upon whom be Allah's peace) laid siege to their quarters towards the end of Shawwal (and according to some others, of Dhi Qa'dah) A. H. 2. The siege had hardly lasted for a fortnight when they surrendered and all their fighting men were tied and taken prisoners. Now Abdullah bin Ubayy came up in support of them and insisted that they should be pardoned. The Holy Prophet conceded his request and decided that the Bani Qainuqa would be exiled from Madinah leaving their properties, armour and tools of trade behind. (Ibn Sa'd, Ibn Hisham, Tarikh Tabari).

For some time after these punitive measures (i. e. the banishment of the Qainuqa and killing of Ka'b bin Ashraf the Jews remained so terror stricken that they did not dare commit any further mischief. But later when in Shawwal, A. H. 3, the Quraish in order to avenge themselves for the defeat at Badr, marched against Madinah with great preparations, and the Jews saw that only a thousand men had marched out with the Holy Prophet (upon whom be Allah's peace) as against three thousand men of the Quraish, and even they were deserted by 300 hypocrites who returned to Madinah, they committed the first and open breach of the treaty by refusing to join the Holy Prophet in the defense of the city although they were bound to it. Then, when in the Battle of Uhud the Muslims suffered reverses, they were further emboldened. So much so that the Bani an-Nadir made a secret plan to kill the Holy Prophet (upon whom be Allah's peace) though the plan failed before it could be executed. According to the details, after the incident of Bi'r Maunah (Safar, A. H. 4) Amr bin Umayyah Damri slew by mistake two men of the Bani Amir in retaliation, who actually belonged to a tribe which was allied to the Muslims, but Amr had mistaken them for the men of the enemy. Because of this mistake their blood money became obligatory on the Muslims. Since the Bani an-Nadir were also a party in the alliance with the Bani Amir, the Holy Prophet (upon whom be Allah's peace) went to their clan along with some of his Companions to ask for their help in paying the blood money. Outwardly they agreed to contribute, as he wished, but secretly they plotted that a person should go up to the top of the house by whose wall the Holy Prophet was sitting and drop a rock on him to kill him. But before they could execute their plan, Allah informed him in time and be immediately got up and returned to Madinah.

Now there was no question of showing them any further concession. The Holy Prophet at once sent to them the ultimatum that the treachery they had meditated against him had come to his knowledge; therefore, they were to leave Madinah within ten days; if anyone of them was found staying behind in their quarters, he would be put to the sword. Meanwhile Abdullah bin Ubayy sent them the message that he would help them with two thousand men and that the Bani Quraizah and Bani Ghatafan also would come to their aid; therefore, they should stand firm and should not go. On this false assurance they responded to the Holy Prophet's ultimatum saying that they would not leave Madinah and he could do whatever was in his power. Consequently, in Rabi' al-Awwal, A. H. 4, the Holy Prophet (upon whom be Allah's peace) laid siege to them, and after a few days of the siege (which according to some traditions were 6 and according to others 15 days) they agreed to leave Madinah on the condition that they could retain all their property which they could carry on thee camels, except the armor. Thus, Madinah was rid of this second mischievous tribe of Jews. Only two of the Bani an-Nadir became Muslims and stayed behind. Others went to Syria and Khaiber.

This is the event that has been discussed in this Surah.