Abdur Rahman bin Harmaz al-A'araj عبد الرحمن بن هرمز الأعرج أبو داود · The Book of Purification

"Were it not that it would be too difficult for my Ummah, I would have commanded them to use the Siwak at (the time of) every Salah."

"If a dog drinks from the vessel of one of you, let him wash it seven times."

"When any one of you performs Wudu', let him put water in his nose then blow it out."

"I noticed the Prophet (ﷺ) was not there one night, so I started looking for him with my hand. My hand touched his feet and they were held upright, and he was prostrating and saying: 'I seek refuge in Your pleasure from Your anger, in Your forgiveness from Your punishment, and I seek refuge in You from You. I cannot praise You enough, You are as You have praised yourself.'"

"I met a man who accompanied the Prophet (ﷺ) as Abu Hurairah (may Allah be pleased with him), accompanied him for four years. He said: 'The Messenger of Allah (ﷺ) forbade any one of us to comb his hair each day, or to urinate in the place where he performs Ghusl, or for a man to perform Ghusl using the leftover water of a women, or a woman to perform Ghusl using the leftover water of a man - they…

"I have become Junub and I do not have any water." 'Umar said: "Do not pray." But 'Ammar bin Yasir said: "O Commander of the Believers! Don't you remember when you and I were on a campaign and we became Junub and could not find water? You did not pray, but I rolled in the dust and prayed. Then we came to the Prophet (ﷺ) and told him about that, and he said: 'It would have been sufficient for you…