[Machine] Fatima bint Abi Hubaysh used to experience istihadah (irregular bleeding outside of the menstrual cycle), so she asked the Messenger of Allah ﷺ. He said, "It is only a vein and not menstruation. When menstruation comes, leave the prayer; and when it ends, perform ghusl (ritual bath) and pray."
أَنَّ فَاطِمَةَ بِنْتَ أَبِي حُبَيْشٍ كَانَتْ تُسْتَحَاضُ فَسَأَلَتْ رَسُولَ اللهِ ﷺ فَقَالَ «إِنَّمَا هُوَ عِرْقٌ وَلَيْسَ بِالْحَيْضَةِ فَإِذَا أَقْبَلَتِ الْحَيْضَةُ فَاتْرُكِي الصَّلَاةَ وَإِذَا أَدْبَرَتْ فَاغْتَسِلِي وَصَلِّي»