Yahya bin Abi Kathir يحيى بن أبي كثير الطائي · The Book of Purification

"When any one of you urinates, let him not hold his penis in his right hand."

"The Messenger of Allah (ﷺ) said: 'When any one of you enters Al-Khala' (the toilet), let him not touch his penis with his right hand.'"

"When any one of you drinks, let him not breathe into the vessel, and when he goes to the toilet let him not touch his penis with his right hand, nor wipe himself with this right hand."

It was narrated from Ibn Abi Qatadah, from his father, that the Prophet (ﷺ) forbade breathing into the vessel (when drinking), touching one's penis with one's right hand, and cleaning oneself with one's right hand.

It was narrated from Ja'far bin 'Amr bin Umayyah Ad-Damri that his father saw the Messenger of Allah (ﷺ) performing Wudu' and wiping over his Khuffs.

"Should I perform Wudu' after eating food that I see in the Book of Allah is permissible because fire has touched it?" Abu Hurairah gathered some pebbles and said: "I bear witness (as many times as) the number of these pebbles, that the Messenger of Allah (ﷺ) said: 'Perform Wudu' from that which has been touched by fire.'"

"The Messenger of Allah (ﷺ) and I would sleep under a single blanket when I was menstruating. If anything got on him from me, he would wash that spot and no more, and pray in it, then come back. If anything got on it again from me, he would do likewise and no more, and he would pray in it."