[Machine] Zainab, the daughter of Jash, menstruated for seven years, during which she would fill a container with water and immerse herself in it until the water turned red due to the blood. She then consulted the Messenger of Allah ﷺ, who told her that it was not menstruation but a vein. He advised her to perform ablution (wudu) and pray, as there was no obligation to perform ghusl (full body washing) for every prayer. This ruling was in accordance with the narrations of Al-Zuhri and the narration of Muhammad ibn Ishaq from Al-Zuhri. Other narrations that contradict it are incorrect. This is supported by the authentic narration from Urwah ibn Malik, from Aisha.  

قَالَتِ اسْتُحِيضَتْ أُخْتُ زَيْنَبَ بِنْتِ جَحْشٍ سَبْعَ سِنِينَ فَكَانَتْ تَمْلَأُ مِرْكَنًا لَهَا مَاءً ثُمَّ تَدْخُلُهُ حَتَّى تَعْلُوَ الْمَاءَ حُمْرَةُ الدَّمِ فَاسْتَفْتَتْ رَسُولَ اللهِ ﷺ فَقَالَ لَهَا إِنَّهُ لَيْسَ بِحَيْضَةٍ وَلَكِنَّهُ عِرْقٌ فَاغْتَسِلِي وَصَلِّي وَلَيْسَ فِيهِ الْأَمْرُ بِالْغُسْلِ لِكُلِّ صَلَاةٍ وَهَذَا أَوْلَى لِمُوَافَقَتِهِ سَائِرَ الرِّوَايَاتِ عَنِ الزُّهْرِيِّ وَرِوَايَةُ مُحَمَّدِ بْنِ إِسْحَاقَ عَنِ الزُّهْرِيِّ غَلَطٌ لِمُخَالَفَتِهَا سَائِرَ الرِّوَايَاتِ عَنِ الزُّهْرِيِّ وَمُخَالَفَتِهَا الرِّوَايَةَ الصَّحِيحَةَ عَنْ عِرَاكِ بْنِ مَالِكٍ عَنْ عُرْوَةَ عَنْ عَائِشَةَ