It was narrated from 'Amr bin Shu'aib, from his father, that his grandfather said:
"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.'" (DE)
English reference (DE): Vol. 1, Book 1, Hadith 140 (DE)
Arabic reference (DE): Book 1, Hadith 141 (DE)