Nazzaal ibn Sabrah rahmatullahi alaihe says that while he was with Sayyidina Ali in the courtyard (of the Masjid at Kufah), water was brought in a clay pot to him. He took some water in his palms, washed his hands, gargled his mouth, put water in his nose (cleaned it), then made masah of his face, hands and head. Thereafter he stood and drank from it. Then said, This is the wudhu of a person who is in a state of wudhu. I had observed Rasoolullah sallallahu alaihe wasallam perform (wudhu) in this manner.
English reference: Book 31, Hadith 200
Arabic reference: Book 32, Hadith 209