It is narrated from Hazrat Fatimah (may Allah be pleased with her) that once she came to the service of the Prophet (peace and blessings be upon him) and complained about continuous bleeding during menstruation. The Prophet (peace and blessings be upon him) said to her: This is blood from a vein, so observe that when the time of your menstrual period comes, do not perform prayers, and when that period passes, consider yourself pure, perform purification, and continue to perform prayers until the next period.