When the Messenger of Allah (peace and blessings of Allah be upon him) came back from (the battle of) al-Khandaq, he and his companions put down their weapons and washed themselves. Jibreel came to him with his head covered with dust and said, “You have put down your weapons! By Allah, I have not put down mine.” The Messenger of Allah (peace and blessings of Allah be upon him) said, “Where to?” He said, “Over there” – and pointed towards Bani Qurayzah. So the Messenger of Allah (peace and blessings of Allah be upon him) set out [to resume the campaign]. (Narrated by al-Bukhaari, no. 2602; Muslim, no. 3315).