[Machine] Zainab used to stay in seclusion with the Prophet ﷺ and during her menstrual period, she would bleed. So he instructed her to take a ritual bath after every prayer.
كَانَتْ زَيْنَبُ تَعْتَكِفُ مَعَ النَّبِيِّ ﷺ وَهِيَ تُرِيقُ الدَّمَ «فَأَمَرَهَا أَنْ تَغْتَسِلَ عِنْدَ كُلِّ صَلَاةٍ»