(3) باب فِي مُعْجِزَاتِ النَّبِيِّ صلى الله عليه وسلم
Anas b. Malik reported that Allah's Apostle (ﷺ) and his Companions were at a place known as az-Zaura' (az-Zaurd' is a place in the bazar of Medina near the mosque) that he called for a vessel containing water. He put his hand in that. And there began to spout (water) between his fingers and all the Companions performed ablution. Qatada, one of the narrators in the chain of narrators, said:
Abu Hamza (the kunya of Hadrat Anas b. Malik), how many people were they? He said: They were about three hundred.
Reference: Sahih Muslim 2279 c
In-book reference: Book 43, Hadith 6
USC-MSA web (English) reference(deprecated numbering scheme): Book 30, Hadith 5658