Sahlah daughter of Suhayl had a prolonged flow of blood. She came to the Prophet ﷺ. He commanded her to take a bath for every prayer. When it became hard for her, he commanded her to combine the noon and afternoon prayers with one bath and the sunset and night prayer with one bath, and to take a bath (separately) for the dawn prayer. Abu Dawud said: Ibn 'Uyainah reported from 'Abd al-Rahman b. al-Qasim on the authority of his father, saying: A woman had a prolonged flow of blood. She asked the Prophet ﷺ. He commanded her to the same effect.  

أَنَّ سَهْلَةَ بِنْتَ سُهَيْلٍ اسْتُحِيضَتْ فَأَتَتِ النَّبِيَّ ﷺ فَأَمَرَهَا أَنْ تَغْتَسِلَ عِنْدَ كُلِّ صَلاَةٍ فَلَمَّا جَهَدَهَا ذَلِكَ أَمَرَهَا أَنْ تَجْمَعَ بَيْنَ الظُّهْرِ وَالْعَصْرِ بِغُسْلٍ وَالْمَغْرِبِ وَالْعِشَاءِ بِغُسْلٍ وَتَغْتَسِلَ لِلصُّبْحِ  

[Machine] It is only Suhailah bint Sahl, and indeed the Messenger of Allah ﷺ commanded her to wash for every prayer. When it became difficult for her, he ordered her to combine Dhuhr and Asr prayers with one washing, and between Maghrib and Isha prayers with one washing, and to wash for Fajr prayer.  

إِنَّمَا هِيَ سُهَيْلَةُ بِنْتُ سَهْلٍ وَإِنَّ رَسُولَ اللهِ ﷺ أَمَرَهَا بِالْغُسْلِ لِكُلِّ صَلَاةٍ فَلَمَّا شَقَّ ذَلِكَ عَلَيْهَا أَمَرَهَا أَنْ تَجْمَعَ الظُّهْرَ وَالْعَصْرَ بِغُسْلٍ وَاحِدٍ وَبَيْنَ الْمَغْرِبِ وَالْعِشَاءِ بِغُسْلٍ وَاحِدٍ وَأَنْ تَغْتَسِلَ لِلصُّبْحِ  

[Machine] "And the Messenger of Allah ﷺ commanded her to perform ablution (washing) before every prayer. When that became difficult for her, he ordered her to combine the Dhuhr (noon) and Asr (afternoon) prayers in one ablution, and the Maghrib (evening) and Isha (night) prayers in one ablution. And she would perform ablution for Fajr (dawn) prayer."  

وَأَنَّ رَسُولَ اللَّهِ ﷺ كَانَ «أَمَرَهَا بِالْغُسْلِ عِنْدَ كُلِّ صَلَاةٍ فَلَمَّا جَهَدَهَا ذَلِكَ أَمَرَ أَنْ تَجْمَعَ بَيْنَ الظُّهْرِ وَالْعَصْرِ فِي غُسْلٍ وَاحِدٍ وَالْمَغْرِبِ وَالْعِشَاءِ فِي غُسْلٍ وَاحِدٍ وَتَغْتَسِلَ لِلصُّبْحِ»