Once the time for As-Salat (the prayer) approached. Those whose houses were near, went to their houses to perform Wudu' while some of the people remained with Messenger of Allah (ﷺ). A stone (containing some water) bowl was brought for him. It was too small for him to spread his hand over it. He performed his Wudu' and it (the water) sufficed for all the others also. Anas was asked: "How many of you were present there?" He said: "Eighty or more."

[Al-Bukhari and Muslim].