Asim al-Ahwal عاصم الأحول · The Book of Purification

"The Prophet (ﷺ) granted us a dispensation when traveling, allowing us not to take off our Khuffs for three days and three nights."

"I asked Safwan bin 'Assal about wiping over the Khuffs, and he said: 'The Messenger of Allah (ﷺ) used to tell us, when we were travelling, to wipe over our Khuffs and not take them off for three nights in the event of defecating, urinating or sleeping; only in the case of Janabah.'"

"I came to a man called Safwan bin 'Assal and sat at his door. He came out and said: 'What do you want?' I said: 'I am seeking knowledge.' He said: 'The angels lower their wings for the seeker of knowledge out of pleasure at what he is seeking.' He said: 'What do you want to know about?' I said: 'About the Khuffs.' He said: 'When we were with the Messenger of Allah (ﷺ) on a journey, he told us…

"When we were with the Messenger of Allah (ﷺ) on a journey, he told us not to take them off for three days except in the case of Janabah, but not in the case of defecation, urinating or sleep."

It was narrated from Umm Hani' that the Messenger of Allah (ﷺ) performed Ghusl, he and Maimunah from a single vessel, a bowl in which there were traces of dough.

It was narrated from Anas bin Malik that the Messenger of Allah (ﷺ) went around all his wives and only performed Ghusl once.