Ya'qub bin Ibrahim bin Sa'd يعقوب بن إبراهيم بن سعد بن إبراهيم · The Book of Purification

"The Messenger of Allah (ﷺ) said: 'When any one of you goes to defecate, let him not face toward the Qiblah, rather let him face towards the east or the west.'"

"I am like a father teaching you. When any one of you goes to Al-Khala' (the toilet), let him not face toward the Qiblah nor turn his back toward it, and let him not clean himself with his right hand." And he used to tell them to use three stones, and he forbade using dung or old bones.

"The Messenger of Allah (ﷺ) said: 'None of you should urinate in still water and perform Ghusl with it.'" Abu 'Abdur-Rahman (An-Nasa'i) said: "ya'qub would not narrate this Hadith except for a Dinar." Ya'qub bin Ibrahim Ad-Dawrqi, and the meaning is that he held the view that it is permissible to accept a payment for narrating, contrary to many others.

"There are two things which I never asked anyone about after I saw the Messenger of Allah (ﷺ). He was with us on a journey and he went away to relieve himself, then he came and performed Wudu', and he wiped over his forehead and two sides of his 'Imamah, and he wiped over his Khuffs." He said: "And (the other issue) the Imam's Salah behind one of his followers. I saw the Messenger of Allah (ﷺ) when he was…

"I remember lying in front of the Messenger of Allah (ﷺ), and the Messenger of Allah (ﷺ) was praying. When he wanted to prostrate he would nudge my foot and I would draw it up (out of the way) until he had finished prostrating."

"A vessel was brought to Mujahid, which I estimated to be eight Ratls, and he said: 'Aishah told me that the Messenger of Allah (ﷺ) used to perform Ghusl using such a vessel.'"

It was narrated from Anas that the Messenger of Allah (ﷺ) used to (go around) all his wives and perform Ghusl once.

"I heard Umm Qais bint Mihsan say that she asked the Messenger of Allah (ﷺ) about menstrual blood that gets on one's clothes. He said: 'Scratch it with a stick and wash it with water and lotus leaves.'"

"We did Tayammum with the Messenger of Allah (ﷺ) using dust, and we wiped our faces and our arms up to the shoulders."