Ishaq bin Ibrahim bin Muhammad إسحاق بن إبراهيم بن محمد · The Book of Menstruation and Istihadah

Fatimah bint Abi Hubaish came to the Messenger of Allah (ﷺ) and said: "I am a woman who suffers from Istihadah and I never become pure. Should I stop praying?" He said: "No, that is a vein, it is not menstruation. When your period comes, stop praying, and when it goes, wash the blood from yourself and pray."

"When one of their womenfolk menstruated, the Jews would not eat or drink with them, or mix with them in their houses. They (the Companions) asked the Prophet of Allah (ﷺ) about that, and Allah, the Mighty and Sublime, revealed the Ayah: They ask you concerning menstruation. Say: "That is an Adha (a harmful thing). So the Messenger of Allah (ﷺ) commanded them to eat and drink with them (menstruating women) and to mix them in their houses, and to…

"While I was lying down with the Messenger of Allah (ﷺ) under a blanket, my period came so I slipped away and put on the clothes I used to wear when I was menstruating. The Messenger of Allah (ﷺ) said: 'Are you menstruating?' I said: 'Yes.' Then he called me to lie down with him under the blanket." This is the wording of 'Ubaidullah bin Sa'eed. That is, one of the narrators in one of the chains, as the author…

"If one of us was menstruating, the Messenger of Allah (ﷺ) would tell her to put on an Izar (waist wrap) then he would fondle her."

"The head of the Messenger of Allah (ﷺ) would rest in the lap of one of us when she was menstruating, and he would recite Qur'an."

"The Messenger of Allah (ﷺ) said: 'Give me the mat from the MAsjid.' She said: 'I am menstruating.' The Messenger of Allah (ﷺ) said: 'Your menstruation is not in your hand.'"