Sunan An Nasai 5379

أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، ‏‏‏‏‏‏عَنْ عَبْدِ الرَّحْمَنِ، ‏‏‏‏‏‏عَنْ سُلَيْمَانَ بْنِ الْمُغِيرَةِ، ‏‏‏‏‏‏عَنْ حُمَيْدِ بْنِ هِلَالٍ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ قَالَ أَبُو رِفَاعَةَ:‏‏‏‏ انْتَهَيْتُ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُوَ يَخْطُبُ، ‏‏‏‏‏‏فَقُلْتُ:‏‏‏‏ يَا رَسُولَ اللَّهِ،‏‏‏‏ رَجُلٌ غَرِيبٌ جَاءَ يَسْأَلُ عَنْ دِينِهِ لَا يَدْرِي مَا دِينُهُ ؟،‏‏‏‏فَأَقْبَلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَتَرَكَ خُطْبَتَهُ حَتَّى انْتَهَى إِلَيَّ،‏‏‏‏ فَأُتِيَ بِكُرْسِيٍّ خِلْتُ قَوَائِمَهُ حَدِيدًا،‏‏‏‏ فَقَعَدَ عَلَيْهِ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ،‏‏‏‏ فَجَعَلَ يُعَلِّمُنِي مِمَّا عَلَّمَهُ اللَّهُ، ‏‏‏‏‏‏ثُمَّ أَتَى خُطْبَتَهُ فَأَتَمَّهَا .

It was narrated that Humaid bin Hilal said: Abu Rifa'ah said: 'I came to the Messenger of Allah [SAW] while he was delivering a Khutbah, and said: O Messenger of Allah, a stranger has come to ask about his religion, for he does not know what his religion is. The Messenger of Allah [SAW] stopped delivering his Khutbah and turned to me. A chair was brought, and I think its legs were of iron. The Messenger of Allah [SAW] sat down on it and started to teach me what Allah has taught him, then he went and completed his Khutbah.'