Mahmud bin Ghaylan محمود بن غيلان العدوي مولاهم أبو أحمد · The Book of Purification

"A man passed by the Prophet (ﷺ) when he was urinating and greeted him with Salam, but he did not return his greeting."

"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.'"

"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.'"

"Aishah described how the Prophet (ﷺ) performed Ghusl for Janabah. She said: 'He used to wash his hands three times, then pour water with his right hand onto his left and wash his private part and whatever was on it.' - (One of the narrators) 'Umar said: "I think he said: 'He would pour water with his right hand onto his left hand three times.'" - "Then he would rinse his mouth three times and his nose three times, and…

"While I was lying down with the Messenger of Allah (ﷺ) under a blanket, my period came, so I slipped away and put on the clothes I used to wear when I was menstruating. The Messenger of Allah (ﷺ) said: 'Are you menstruating?' I said: 'Yes.' Then he called me and I lied down with him under the blanket."