"The Messenger of Allah ﷺ said: 'Do Wudu' properly.'" [1] [1] Isbighu Al-Wudu'. And this narration supports the claim that some of them used this expression to mean "three times" for each limb, rather than "properly."
قَالَ رَسُولُ اللَّهِ ﷺ أَسْبِغُوا الْوُضُوءَ