Qatada قتادة · The Book of Purification and its Sunnah

The Messenger of Allah said: "The key to prayer is purification, its opening is to say Allahu Akbar and its closing is to say As-salamu 'alaikum."

"We went out on a journey with the Messenger of Allah, and the Messenger of Allah would not relieve himself until he had disappeared and could not be seen by anyone."

When the Messenger of Allah wanted to relieve himself, he would go far away.

"I saw the Messenger of Allah performing ablution, and he ran his little finger between his toes." (Sahih) Another chain with similar wording.

"I heard the Messenger of Allah say: 'Woe to the Achilles' tendon because of Hell-fire."

The Prophet said: "Perform ablution after (eating) that which has been changed by fir." Ibn 'Abbas said: "Should I do ablution after (touching) hot water?" Abu Hurairah said: "O son of my brother, when I narrate a Hadith of the Messenger of Allah to you, then do not try to make examples for it."

He saw Sa'd bin Malik wiping over his leather socks and said: "Is it you doing this?" They both went to 'Umar and Sa'd said to 'Umar: "Give my brother's son a verdict regarding wiping over leather socks." 'Umar said: "We used to wipe over our leather socks when we were with the Messenger of Allah and we do not see anything wrong with that." Ibn 'Umar said: "Even if that is after one has defecated?" He said: "Yes."

An-Najashi gave the Prophet a gift of a pair of plain black leather socks. He put them on, then he (performed ablution and) wiped over them.

A man asked him: "How much water should I pour over my head when I m sexually impure?" He said: "the messenger of Allah used to pour three handfuls of water over his head." The man said: "My hair is long." He said: "The Messenger of Allah had more hair than you and he was cleaner."

"The Messenger of Allah would not perform ablution after the bath to cleanse himself from sexual impurity."

He used to become sexually impure at night, then he would want to sleep. The Messenger of Allah told him to perform ablution and then go to sleep.

"I used to eat the meat from a bone when I was menstruating, then the Messenger of Allah would take it and put his mouth where my mouth had been. And I would drink from a vessel, and the Messenger of Allah would take it and put his mouth where my mouth had been, and I was menstruating."