Musannaf Ibn Abi Shaybah

Sulaiman says that I asked Hazrat Ibn Sirin, if a woman’s menstruation lasts for specific days but sometimes becomes longer, what should she do? He replied that women know more about this matter. He says that I asked Hazrat Qatadah about this and said, if a woman’s menstruation lasts for specific days and it extends by five days, what should she do? He replied that she should perform prayers. I asked, if it extends by four days? He said she should perform prayers. I asked, if it extends by three days? He said that she should perform prayers. I asked, if it extends by two days? He replied that these are the days of menstruation. In my opinion, he said this according to his own judgment.

Hazrat Tawus says that if a woman's menstruation exceeds its prescribed duration, she should perform ghusl (ritual bath) and offer prayers. Hazrat Hammad says that even if a woman's menstruation exceeds its prescribed duration, she should not perform the ghusl of purification, because this keeps happening with women.

Hazrat Uthman bin Abi Al-Aas says that if a woman sees yellowish discharge on days other than her menstrual days, and if this is one or two days more than her usual menstrual days, then she should count it as part of her menstruation. If it exceeds two days, then she should consider it as istihada (irregular bleeding). If her menstruation lasts six days and she sees blood for up to eight days, she should count it as menstruation, and if she sees blood for more than eight days, she should consider it as istihada.