Banu Qurayza after his victory over the Meccans in the Battle of Badr, Banu Qaynuqa threatened Muhammad's political position and assaulted a Muslim woman which led to their expulsion from Medina for breaking the peace treaty of Constitution of Medina. The Qurayza remained passive during the whole Qaynuqa affair, apparently because the Qaynuqa were historically allied with the Khazraj, while the Qurayza were the allies of the Aws. Soon afterwards, Muhammad came into conflict with the Banu Nadir. He had one of the Banu Nadir's chiefs, the poet Ka'b ibn al-Ashraf, assassinated and after the Battle of Uhud accused the tribe of
Battle of Badr with the polytheists, we shall be steadfast in our support to you. In war and in peace, we shall be consistently faithful to you." So, the Muslims continued to march towards Badr. By 11 March both armies were about a day's march from Badr. Several Muslim warriors (including, according to some sources, Ali) who had ridden ahead of the main column captured two Meccan water carriers at the Badr wells. Expecting them to say they were with the caravan, the Muslims were horrified to hear them say they were with the main Quraishi army. Some traditions also say that, upon