Anas b. Malik reported :

A man entered the mosque on camel and made it kneel down, and then tied his leg with rope. He then asked: Who among you is Muhammad? The Messenger of Allah (ﷺ) was sitting leaning upon something among them. We said to him: This white (man) who is leaning. The man said: O son of ‘Abd al-Muttalib. The Prophet (ﷺ) said; I already responded to you. The man (again) said: O Muhammad. I am asking you. The narrator then narrated the rest of the tradition.

حَدَّثَنَا عِيسَى بْنُ حَمَّادٍ، حَدَّثَنَا اللَّيْثُ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ شَرِيكِ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي نَمِرٍ، أَنَّهُ سَمِعَ أَنَسَ بْنَ مَالِكٍ، يَقُولُ دَخَلَ رَجُلٌ عَلَى جَمَلٍ فَأَنَاخَهُ فِي الْمَسْجِدِ ثُمَّ عَقَلَهُ ثُمَّ قَالَ أَيُّكُمْ مُحَمَّدٌ وَرَسُولُ اللَّهِ صلى الله عليه وسلم مُتَّكِئٌ بَيْنَ ظَهْرَانَيْهِمْ فَقُلْنَا لَهُ هَذَا الأَبْيَضُ الْمُتَّكِئُ ‏.‏ فَقَالَ الرَّجُلُ يَا ابْنَ عَبْدِ الْمُطَّلِبِ ‏.‏ فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم ‏

‏ قَدْ أَجَبْتُكَ ‏

‏ ‏.‏ فَقَالَ لَهُ الرَّجُلُ يَا مُحَمَّدُ إِنِّي سَائِلُكَ ‏.‏ وَسَاقَ الْحَدِيثَ ‏.‏