It is narrated from Shahr bin Hawshab: Regarding a woman experiencing istihada (non-menstrual vaginal bleeding), Sayyiduna Ibn Abbas (may Allah be pleased with them both) was asked, so he replied: She will wait for the number of days of her menstruation and refrain from prayer, then she will perform ghusl (ritual bath) and offer prayers, until her menstrual days return, then she will again leave the prayer and perform ghusl. This continuous flow of blood is from Satan; he wants that one of these women should abandon prayer and thus fall into disbelief.