Al-Bara' bin `Azib said (through another chain of sub-narrators):"On the day of Quraiza's (siege), Allah's Messenger (saws) said to Hassan bin Thabit, 'Abuse them (with your poems), and Jibril is with you.'"

Narrated Hassan bin Thabit Al-Ansari: I asked Abu Huraira "By Allah! Tell me the truth whether you heard the Prophet saying, 'O Hassan! Reply on behalf of Allah's Apostle. O Allah! Help him with the Holy Spirit." Abu Huraira said, "Yes . "

Narrated Sa`id bin Al-Musaiyab: `Umar came to the Mosque while Hassan was reciting a poem. (`Umar disapproved of that). On that Hassan said, "I used to recite poetry in this very Mosque in the presence of one (i.e. the Prophet) who was better than you." Then he turned towards Abu Huraira and said (to him), "I ask you by Allah, did you hear Allah's Apostle saying (to me), "Retort on my behalf. O Allah! Support him (i.e. Hassan) with the Holy Spirit?" Abu Huraira said, "Yes."

Narrated Al Bara: The Prophet said to Hassan, "Lampoon them (i.e. the pagans) and Gabriel is with you."

Narrated Abu Salama bin `Abdur-Rahman bin `Auf: that he heard Hassan bin Thabit Al-Ansari asking the witness of Abu Huraira, saying, "O Abu- Huraira! I beseech you by Allah (to tell me). Did you hear Allah's Apostle saying' 'O Hassan! Reply on behalf of Allah's Apostle. O Allah! Support him (Hassan) with the Holy Spirit (Gabriel).'?" Abu Huraira said, "Yes."

Narrated Al-Bara: The Prophet said to Hassan, "Lampoon them (the pagans) in verse, and Gabriel is with you."