Sunan an-Nasa'i 76
It was narrated that Anas said:
"I saw the Messenger of Allah (ﷺ) when the time for 'Asr prayer had come. The people looked for (water for) Wudu' but they could not find any. Then some (water for) Wudu' was brought to the Messenger of Allah (ﷺ). He put his hand in that vessel and told the poeple to perform Wudu', and I saw water springing from beneath his fingers, until they had all performed Wudu'."
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، عَنْ أَنَسٍ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم وَحَانَتْ صَلاَةُ الْعَصْرِ فَالْتَمَسَ النَّاسُ الْوَضُوءَ فَلَمْ يَجِدُوهُ فَأُتِيَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِوَضُوءٍ فَوَضَعَ يَدَهُ فِي ذَلِكَ الإِنَاءِ وَأَمَرَ النَّاسَ أَنْ يَتَوَضَّئُوا فَرَأَيْتُ الْمَاءَ يَنْبُعُ مِنْ تَحْتِ أَصَابِعِهِ حَتَّى تَوَضَّئُوا مِنْ عِنْدِ آخِرِهِمْ ‏.‏