Sahih Bukhari, Chapter: Ablutions (Wudu')

Anas said, "The Prophet 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."