[Machine] Zainab bint Jahsh was experiencing Istihadah (continuous bleeding outside of menstruation) during the time of the Messenger of Allah ﷺ . The Messenger of Allah ﷺ instructed her to perform ablution for every prayer. If she found the place of blood to be filled with water, she should submerge herself in it and then come out. However, if blood was prevalent, she should remove it and then perform the prayer.  

أَنَّ زَيْنَبَ بِنْتَ جَحْشٍ اسْتُحِيضَتْ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ فَأَمَرَهَا رَسُولُ اللهِ ﷺ بِالْغُسْلِ لِكُلِّ صَلَاةٍ فَإِنْ كَانَتْ لَتَدْخُلُ الْمِرْكَنَ مَمْلُوءً مَاءً فَتَغْمِسُ فِيهِ ثُمَّ تَخْرُجُ مِنْهُ وَإِنَّ الدَّمَ لَعَالِيهِ فَتَخْرُجُ فَتُصَلِّي  

[Machine] It is reported that the daughter of Ja'hsh informed the Prophet Muhammad ﷺ that she used to have irregular bleeding during her period. The Prophet ﷺ instructed her to perform a ritual purification (ghusl) for every prayer. If she noticed that blood was entering her vagina while inside the mosque, and she found water inside the mosque, she should submerge herself in it and then exit. If the blood was on top of the water, she should pray without repeating the purification.  

أَنَّ ابْنَةَ جَحْشٍ «اسْتُحِيضَتْ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ فَأَمَرَهَا رَسُولُ اللَّهِ ﷺ بِالْغُسْلِ لِكُلِّ صَلَاةٍ فَإِنْ كَانَتْ لَتَدْخُلُ الْمِرْكَنَ وَإِنَّهُ لَمَمْلُوءٌ مَاءً فَتَنْغَمِسُ فِيهِ ثُمَّ تَخْرُجُ مِنْهُ وَإِنَّ الدَّمَ فَوْقَهُ لَغَالبُهُ فَتُصَلِّي»