حَدَّثَنَا زَكَرِيَّا بْنُ عَدِيٍّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَمْرٍو، عَنْ عَبْدِ الْكَرِيمِ، عَنْ سَعِيدِ بْنِ الْمُسَيِّبِ، قَالَ: "الْمُسْتَحَاضَةُ تَغْتَسِلُ كُلَّ يَوْمٍ عِنْدَ صَلَاةِ الْأُولَى".
It is narrated from Abdul Karim (bin Malik Jazari), Saeed bin Al-Musayyib (may Allah have mercy on him) said: A woman experiencing istihada will perform ghusl for the first prayer of each day.