Sunan Ibn Majah Book 1, Hadith 156
A Bedouin came to the Prophet and asked him about ablution. He showed him how to perform it washing each part of the body three times. Then he said: 'This is the ablution, and whoever does more than this, has done evil, transgressed the limits and wronged himself.'"
"The Messenger of Allah said: 'There is a devil for ablution who is called Walahan, so be on guard against the insinuating thoughts (Waswas) about water.'"
"I heard Ibn 'Abbas say: 'I stayed overnight with my maternal aunt Maimunah, and the Prophet got up and performed ablution from an old water skin, and he did a brief ablution. Then I got up and did the same as he had done."