Muhammad bin Abi 'Adi محمد بن أبي عدي · The Book of Purification and its Sunnah

"The Messenger of Allah came to us and asked us for water for ablution. I brought water to him and he rinsed his mouth and sniffed water up into his nostrils from one handful."

"The Messenger of Allah used to perform ablution for every prayer, and we used to perform all of the prayers with one ablution."