Narrated Humaid:Anas bin Malik said, "Once the time of the prayer became due and the people whose houses were close to the Mosque went to their houses to perform ablution, while the others remained (sitting there). A stone pot containing water was brought to the Prophet, who wanted to put his hand in it, but It was too small for him to spread his hand in it, and so he had to bring his fingers together before putting his hand in the pot. Then all the people performed the ablution (with that water)." I asked Anas, "How many persons were they." He replied, "There were eighty men."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُنِيرٍ، سَمِعَ يَزِيدَ، أَخْبَرَنَا حُمَيْدٌ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ حَضَرَتِ الصَّلاَةُ فَقَامَ مَنْ كَانَ قَرِيبَ الدَّارِ مِنَ الْمَسْجِدِ يَتَوَضَّأُ، وَبَقِيَ قَوْمٌ، فَأُتِيَ النَّبِيُّ صلى الله عليه وسلم بِمِخْضَبٍ مِنْ حِجَارَةٍ فِيهِ مَاءٌ، فَوَضَعَ كَفَّهُ فَصَغُرَ الْمِخْضَبُ أَنْ يَبْسُطَ فِيهِ كَفَّهُ، فَضَمَّ أَصَابِعَهُ فَوَضَعَهَا فِي الْمِخْضَبِ، فَتَوَضَّأَ الْقَوْمُ كُلُّهُمْ جَمِيعًا. قُلْتُ كَمْ كَانُوا قَالَ ثَمَانُونَ رَجُلاً.
Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions • Hadith 84