He used to reply...
He used to reply: Yes, I have seen Dahiya Kalbi,” because that day Jibraeel had appeared in his form and had put a purple cloth on his horse. When the army of the Prophet reached the fort of Bani Quraiza, their announcer called: Where is Abu Lubabah bin Abu Manzar. The Holy Prophet (S) told Abu Lubabah that he was being summoned by Bani Quraiza. When he went to them they began to weep and said: We cannot face the army which is coming behind you.
The story of Abu Lubabah will be narrated after this. Ali bin Ibrahim has narrated that after the flight and defeat of Quraish, Huyy bin Akhtab came and entered the fort of Bani Quraiza. And when Amirul Momineen (a.s.) fixed the Islamic standard below the fort, Kaab bin Usaid saw them from the fort. He was reviling the Muslims and insulting the Prophet, but the Messenger of Allah (S) was not responding.
According to the report of Shaykh Mufeed, when they saw the Prophet, they remembered that the eliminator of Amr Ibn Abde Wudd was here. So a terrible fright overtook them. Prophet came near the fort mounted on an ass.
Amirul Momineen (a.s.) stepped forward to welcome him and he said: O Messenger of Allah (S), May my parents be sacrificed on you, don’t go near the fort.” The Holy Prophet (S) thought that it was perhaps because he did not want him to hear any insult from them and the Prophet said: “When they see me, the Almighty Allah will humiliate them further and they will desist from whatever they are uttering.
And like the Almighty Allah gave you power over Amr Ibn Abde Wudd, in the same way you will helped over them. The Almighty Allah has helped me with awe and my awe is created in people from a distance of one month’s journey. Thus when he came near the fort, he said: “O brothers of monkeys and pigs, O devotees of Satan; do you abuse me?
When come to avenge from a group, that day is very unfortunate for them.” Kaab looked from the roof of the fort and said: O Abul Qasim you never resorted to abuses like ignorant people.” Imam Ja’far Sadiq (a.s.) says: “When the Messenger of Allah (S) heard this, he was so embarrassed that his robe and staff fell down and he moved a few paces to the back.” There were many date trees around the fort so there was no place for the army to camp there.
The Holy Prophet (S) signed to the trees and they spread in the desert leaving an open field around the fort. The army camped there and laid siege to them for three days.