عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: إِنَّ سَلَمَةَ (وَفِي رِوَايَةٍ: سُهَيْلَةَ) بِنْتَ سُهَيْلِ بْنِ عَمْرٍو اسْتُحِيضَتْ فَأَتَتْ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَسَأَلَتْهُ عَنْ ذَلِكَ، فَأَمَرَهَا بِالْغُسْلِ عِنْدَ كُلِّ صَلَاةٍ، فَلَمَّا جَهَدَهَا ذَلِكَ أَمَرَهَا أَنْ تَجْمَعَ بَيْنَ الظُّهْرِ وَالْعَصْرِ بِغُسْلٍ وَالْمَغْرِبَ وَالْعِشَاءِ بِغُسْلٍ وَالصُّبْحِ بِغُسْلٍ
It is narrated from Sayyida Aisha (RA) that Sayyida Salma or Suhailah bint Suhail (RA) was afflicted with the blood of Istihada. She came to the Messenger of Allah (peace and blessings be upon him) and asked about this matter. The Prophet (peace and blessings be upon him) ordered her to perform ghusl (ritual bath) for every prayer. But when this became difficult for her, the Prophet (peace and blessings be upon him) instructed her to perform one ghusl for Zuhr and Asr together, one ghusl for Maghrib and Isha together, and a separate ghusl for the Fajr prayer.