Sunan Ibn Majah Book 1, Hadith 145
"I saw the Messenger of Allah performing ablution, taking one handful (of water) at a time.'"
"I asked Abu Ja'far: Was it narrated to you from Jabir bin 'Abdullah that the Prophet performed ablution washing each part once?' He said: 'Yes.' I said: 'And each part twice, and each part thrice?' He said: 'Yes.'"
"I saw the Messenger of Allah during the campaign of Tabuk performing ablution, washing each part once."