al-Zuhri ابن شهاب الزهري‎, محمد بن مسلم · The Book of Menstruation and Istihadah

"That is a vein, so when the time of menstruation comes, stop praying, and when it goes, take your bath and wash the blood from yourself then pray."

"When the time of menstruation comes, stop praying, and when it goes, perform Ghusl."

"That is not menstruation, rather it is a vein. Tell her not to pray for the period of time that her period used to last, then let her perform Ghusl and pray." She used to perform Ghusl for every prayer.

"If it is menstrual blood then it is blood that is black and recognizable, so stop prying, and if it is other than that then perform Wudu', for it is just a vein."

"Menstrual blood is blood that is black and recognizable, so if it is like that, then stop praying, and if it is otherwise, then perform Wudu' and pray." Abu 'Abdur-Rahman said: Others reported this Hadith, and none of them mentioned what Ibn 'Adi mentioned, and Allah knows best.

"The Messenger of Allah (ﷺ) would fondle one of his wives when she was menstruating, if she wore and Izar (waist wrap) that reached halfway down her thighs or to her knees.

"The Messenger of Allah (ﷺ) used to lay his head in the lap of one of us and recite Qur'an while she was menstruating, and one of us would take the mat to the Masjid and spread it out when she was menstruating."