Abdullah bin 'Amr bin al-'Aas · The Book of Purification

"The Messenger of Allah (ﷺ) saw some people whose heels were still dry, so he said: 'Woe to the heels from the Fire. Perform Wudu' properly.'"

"The Messenger of Allah (ﷺ) said: 'Do Wudu' properly.'" 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."

'Perform Wudu' from that which has been touched by fire.'"

"The Messenger of Allah (ﷺ) said: 'Perform Wudu' from that which has been altered by fire.'"