Mishkat al-Masabih 559

Umm Salama reported that in the time of the Messenger of Allah a woman had prolonged bleeding. Umm Salama sought a ruling for her from the Messenger of Allah, who said: ‘Let her consider the number of nights and days she used to menstruate each month before this affliction began. She should refrain from prayer for that length of time each month. When she has passed that period, she should perform a ritual bath, secure a cloth around herself, and pray.’ Mālik, Abū Dāwūd, and al-Dārimī transmitted it; al-Nasāʾī transmitted a report with the same meaning. (Graded ṣaḥīḥ.)