Abu Hatim al-Razi أبو حاتم الرازي · The Book of Purification and its Sunnah

"The thing that the Prophet most liked to conceal himself behind when relieving himself was a hillock or a stand of date-palm trees."

"The Prophet was asked about doubts (concerning ablution) during prayer. He said: 'he should not leave until he hears a sound or detects an odor.'"

The Messenger of Allah said: "The urine of a boy should be sprinkled over and the urine of a girl should be washed."

"I remember when I found it (semen) on the garment of the Messenger of Allah and I scratched it off."

"I saw the Messenger of Allah performing ablution, wearing a Qatari turban. He put his hand beneath the turban and wiped the front part of his head, and he did not take the turban off."

The Messenger of Allah would become sexually impure then sleep as he was, without touching water. (Da'if)Sufyan said: "I mentioned this Hadith one day, and Isma'il said to me: 'O young man, you should support this Hadith with something else.'"

'Umar bin Khattab said to the Messenger of Allah: "can anyone of us sleep if he is sexually impure?" He said: "Yes, if he performs ablution."

"The Messenger of Allah said: 'When the two circumcised parts meet, and (the tip of the penis) disappears, then bath is obligatory.'"

"The Messenger of Allah said: 'Whoever has intercourse with a menstruating woman, or with a woman in her rear, or who goes to a fortuneteller and believes what he says, he has disbelieved in that which was revealed to Muhammad.'"

The Jews would not sit with a menstruating woman in a house, nor eat with her, nor drink with her. That was mentioned to the Messenger of Allah, then Allah revealed the words: "They ask you concerning menstruation. Say: that is a harmful thing, therefore keep away from women during menses." The Messenger of Allah said: "Do everything except sexual intercourse."

"I asked the Messenger of Allah about eating with a menstruating woman and he said: 'Eat with her.'"

The Prophet entered upon her, and a freed slave girl of hers concealed herself. The Prophet asked: "Have her periods begun?" She said: "Yes." He tore a piece of his turban and said: "Cover your head with this."