حَدَّثَنَا حَرْمَلَةُ بْنُ يَحْيَى الْمِصْرِيُّ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ بْنُ يَزِيدَ، عَنِ ابْنِ شِهَابٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ فَرَضَ اللَّهُ عَلَى أُمَّتِي خَمْسِينَ صَلاَةً فَرَجَعْتُ بِذَلِكَ ‏.‏ حَتَّى آتِيَ عَلَى مُوسَى فَقَالَ مُوسَى مَاذَا افْتَرَضَ رَبُّكَ عَلَى أُمَّتِكَ قُلْتُ فَرَضَ عَلَىَّ خَمْسِينَ صَلاَةً ‏.‏ قَالَ فَارْجِعْ إِلَى رَبِّكَ فَإِنَّ أُمَّتَكَ لاَ تُطِيقُ ذَلِكَ ‏.‏ فَرَاجَعْتُ رَبِّي فَوَضَعَ عَنِّي شَطْرَهَا فَرَجَعْتُ إِلَى مُوسَى فَأَخْبَرْتُهُ فَقَالَ ارْجِعْ إِلَى رَبِّكَ فَإِنَّ أُمَّتَكَ لاَ تُطِيقُ ذَلِكَ ‏.‏ فَرَاجَعْتُ رَبِّي فَقَالَ هِيَ خَمْسٌ وَهِيَ خَمْسُونَ لاَ يُبَدَّلُ الْقَوْلُ لَدَىَّ ‏.‏ فَرَجَعْتُ إِلَى مُوسَى فَقَالَ ارْجِعْ إِلَى رَبِّكَ ‏.‏ فَقُلْتُ قَدِ اسْتَحْيَيْتُ مِنْ رَبِّي ‏"‏ ‏.‏
Translation
It wasnarrated from Sharik bin ‘Abdullah bin Abu Namir that he heardAnasbin Malik say

“While we were sitting in the mosque, a manenteredriding a camel; he made it kneel in the mosque, then hehobbled itand said to them: ‘Which of you is Muhammad?’ The MessengerofAllah (ﷺ) was reclining among them, so they said: ‘Thisfair-skinned man who is reclining.’ The man said to him: ‘O sonof ‘Abdul-Muttalib!’ The Prophet (ﷺ) said: ‘I am listening toyou.’ The mansaid: O Muhammad! I am asking you and will be sternin asking, so donot bear any ill-feelings towards me.’ He said:‘Ask whatever youthink.’ The man said: ‘I adjure you by yourLord and the Lord of thosewho came before you, has Allah sent you toall of mankind?’ TheMessenger of Allah (ﷺ) said: ‘By Allah,yes.; He said: ‘I adjure youby Allah, has Allah commanded you topray the five prayers each dayand night?’ The Messenger of Allah(ﷺ) said: ‘By Allah, yes.’ Hesaid: ‘I adjure you by Allah,has Allah commanded you to fast thismonth of each year?’ TheMessenger of Allah (ﷺ) said: ‘By Allah,yes.’ He said: ‘Iadjure you by Allah, has Allah commanded you to takethis charityfrom our rich and distribute it among our poor?’ TheMessenger ofAllah (ﷺ) said: ‘By Allah, yes.’ The man said: ‘Ibelieve inwhat you have brought, and I am the envoy of my people whoare behindme. I am Dimam bin Tha’labah, the brother of Banu Sa’d binBakr.’”