ذِكْرُ الْبَيَانِ بِأَنَّ كَوْنَ جِبْرِيلَ عَلَيْهِ السَّلَامُ مَعَ حَسَّانِ بْنِ ثَابِتٍ مَا دَامَ يُهَاجِي الْمُشْرِكِينَ، إِنَّمَا كَانَ ذَلِكَ بِدُعَاءِ الْمُصْطَفَى ﷺ
I adjure you by Allah if you had not heard Allah's Apostle ﷺ saying: Hassin, give a reply on behalf of the Messenger of Allah. O Allah, help him with Ruh-ul-Qudus. Abu Huraira said: Yes, it is so. (Using translation from Muslim 2485c)
سَمِعْتَ رَسُولَ اللَّهِ ﷺ يَقُولُ «أَجِبْ عَنِّي اللَّهُمَّ أَيِّدْهُ بِرُوحِ الْقُدُسِ» قَالَ نَعَمْ