Banu Qurayza - Battle of The Trench

Battle of The Trench

In 627, the Meccans, accompanied by tribal allies as well as the Banu Nadir - who had been very active in supporting the Meccans - marched against Medina - the Muslim stronghold - and laid siege to it. It is unclear whether their treaty with Muhammad obliged the Qurayza to help him defend Medina, or merely to remain neutral, according to Ramadan, they had signed an agreement of mutual assistance with Muhammad. The Qurayza did not participate in the fighting - according to David Norcliffe, because they were offended by attacks against Jews in Muhammad's preaching - but lent tools to the town's defenders. According to Al-Waqidi, the Banu Qurayza helped the defense effort of Medina by supplying spades, picks, and baskets for the excavation of the defensive trench the defenders of Medina had dug in preparation. According to Watt, the Banu Qurayza "seem to have tried to remain neutral" in the battle but later changed their attitude when a Jew from Khaybar persuaded them that Muhammad was sure to be overwhelmed and though they did not commit any act overtly hostile to Muhammad, according to Watt, they entered into negotiations with the invading army.

Ibn Ishaq writes that during the siege, the Qurayza readmitted Huyayy ibn Akhtab, the chief of the Banu Nadir whom Muhammad had exiled and who had instigated the alliance of his tribe with the besieging Quraysh and Ghatafan tribes. According to Ibn Ishaq, Akhtab persuaded the Qurayza chief Ka'b ibn Asad to help the Meccans conquer Medina. Ka'b was, according to Al-Waqidi's account, initially reluctant to break the contract and argued that Muhammad never broke any contract with them or exposed them to any shame, but decided to support the Meccans after Huyayy had promised to join the Qurayza in Medina if the besieging army would return to Mecca without having killed Muhammad. Ibn Kathir and al-Waqidi report that Huyayy tore into pieces the agreement between Ka'b and Muhammad.

Rumors of this one-sided renunciation of the pact spread and were confirmed by Muhammad's emissaries, Sa'd ibn Mua'dh and Sa'd ibn Ubadah, leading men of the Aws and Khazraj respectively. Sa'd ibn Mua'dh reportedly issued threats against the Qurayza but was restrained by his colleague. As this would have allowed the besiegers to access the city and thus meant the collapse of the defenders' strategy, Muhammad "became anxious about their conduct and sent some of the leading Muslims to talk to them; the result was disquieting." According to Ibn Ishaq, Muhammad sent Nuaym ibn Masud, a well-respected elder of the Ghatafan who had secretly converted to Islam, to go to Muhammad's enemies and sow discord among them. Nuaym went to the Qurayza and advised them to join the hostilities against Muhammad only if the besiegers provide hostages from among their chiefs. He then hurried to the invaders and warned them that if the Qurayza asked for hostages, it is because they intended to turn them over to the Medinan defenders. When the representatives of the Quraysh and the Ghatafan came to the Qurayza, asking for support in the planned decisive battle with Muhammad, the Qurayza indeed demanded hostages. The representatives of the besiegers refused, breaking down negotiations and resulting in the Banu Qurayza becoming extremely distrustful of the besieging army. The Qurayza did not take any actions to support them until the besieging forces retreated. Thus the threat of a second front against the defenders never materialised.