I saw Allah's Messenger (ﷺ) at the 'time when the `Asr prayer was due. Then the people were searching for water for ablution but they could not find any. Then some water was brought to Allah's Messenger (ﷺ) and he placed his hand in the pot and ordered the people to perform the ablution with the water. I saw water flowing from underneath his fingers and the people started performing the ablution till all of them did it.
Sahih al-Bukhari Book 61, Hadith 82
← Previous Hadith A bowl of water was brought to the Prophet (ﷺ) while he was at Az-Zawra. He placed his hand in it and the water started flowing among his fingers. All the people performed ablution (with that water). Qatada asked Anas, "How many people were you?" Anas replied, "Three hundred or nearly three hundred."

Sahih al-Bukhari Book 61, Hadith 81 Next Hadith → The Prophet (ﷺ) went out on one of his journeys with some of his companions. They went on walking till the time of the prayer became due. They could not find water to perform the ablution. One of them went away and brought a little amount of water in a pot. The Prophet (ﷺ) took it and performed the ablution, and then stretched his four fingers on to the pot and said (to the people), "Get up to perform the ablution." They started performing the ablution till all of them did it, and they were seventy or so persons.

Sahih al-Bukhari Book 61, Hadith 83