(30) بَابُ مَرْجَعِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنَ الأَحْزَابِ وَمَخْرَجِهِ إِلَى بَنِي قُرَيْظَةَ وَمُحَاصَرَتِهِ إِيَّاهُمْ
Al-Bara' bin `Azib said (through another chain of sub-narrators):
"On the day of Quraiza's (siege), Allah's Messenger (ﷺ) said to Hassan bin Thabit, 'Abuse them (with your poems), and Jibril is with you.'"
Reference: Sahih al-Bukhari 4124
In-book reference: Book 64, Hadith 168
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 59, Hadith 449