Musa bin Abi Aa'isha موسى بن أبي عائشة · The Book of Purification

"A Bedouin came to the Prophet (ﷺ) to ask him about Wudu', so he showed him how to perform Wudu', washing each part three times, then he said: 'This is Wudu'. Whoever does more than that has done badly, done to extremes and done wrong.'"