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 ‏.‏
Translation
Anas b. Malik reported

A man entered upon a camel, made it kneel in the masjid, tied its leg, and then asked, "Which of you is Muhammad?" while the Messenger of Allah, may Allah bless him and grant him peace, was reclining amongst them. We said to him, "This white man who is reclining." The man said, "O son of Abd al-Muttalib." The Prophet, may Allah bless him and grant him peace, said to him, "I have responded to you." The man said to him, "O Muhammad, indeed I am asking you," and he drove the rest of the hadith.