Anas said, "The Prophet (ﷺ) asked for water and a tumbler with a broad base and no so deep, containing a small quantity of water, was brought to him whereby he put his fingers in it." Anas further said, ' noticed the water springing out from amongst his fingers." Anas added, ' estimated that the people who performed ablution with it numbered between seventy to eighty."
Sahih al-Bukhari Book 4, Hadith 66
← Previous Hadith (on the authority of his father) My uncle used to perform ablution extravagantly and once he asked `Abdullah bin Zaid to tell him how he had seen the Prophet (ﷺ) performing ablution. He asked for an earthenware pot containing water, and poured water from it on his hands and washed them thrice, and then put his hand in the earthenware pot and rinsed his mouth and washed his nose by putting water in it and then blowing it out thrice with one handful of water; he again put his hand in the water and took a handful of water and washed his face thrice, then washed his hands up to the elbows twice, and took water with his hand, and passed it over his head from front to back and then from back to front, and then washed his feet (up to the ankles) and said, "I saw the Prophet (ﷺ) performing ablution in that way."

Sahih al-Bukhari Book 4, Hadith 65 Next Hadith → The Prophet (ﷺ) used to take a bath with one Sa` up to five Mudds (1 Sa` = Mudds) of water and used to perform ablution with one Mudd of water.

Sahih al-Bukhari Book 4, Hadith 67