Anas bin Malik reported,

The Prophet of Allah ﷺ and his companions were at Zawra. Zawra is a place in Medina near the marketplace and the mosque. There, he called for a vessel of water, placed his palm in it, and water began to gush out from between his fingers, until all of his companions performed ablution.I asked, "Abu Hamza, how many were they?"He replied, "They were nearly three hundred."

Muslim 5943

Sahih

حدثني أبو غسان المسمعي حدثنا معاذ يعني ابن هشام حدثني أبي عن قتادة

حدثنا أنس بن مالك

أن نبي الله ﷺ وأصحابه بالزوراء قال والزوراء بالمدينة عند السوق والمسجد فيما ثمه دعا بقدح فيه ماء فوضع كفه فيه فجعل ينبع من بين أصابعه فتوضأ جميع أصحابه قال قلت كم كانوا يا أبا حمزة قال كانوا زهاء الثلاث مائة

مسلم 5943صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Virtues
Chapter
Miracles of the Prophet ﷺ
Numbering
Darussalam 5943
Muslim 5943