أَنَّ النَّبِيَّ صلى الله عليه وسلم اعْتَكَفَ مَعَهُ بَعْضُ نِسَائِهِ وَهْىَ مُسْتَحَاضَةٌ تَرَى الدَّمَ، فَرُبَّمَا وَضَعَتِ الطَّسْتَ تَحْتَهَا مِنَ الدَّمِ. وَزَعَمَ أَنَّ عَائِشَةَ رَأَتْ مَاءَ الْعُصْفُرِ فَقَالَتْ كَأَنَّ هَذَا شَىْءٌ كَانَتْ فُلاَنَةُ تَجِدُهُ.
Aishah reported that one of the wives of the Prophet ﷺ was in seclusion (i'tikaf) with him while she had prolonged bleeding (istihadah) and saw blood, and she would sometimes place a basin beneath her because of the blood. And he stated …
also in Sahih al-Bukhari 310, Sahih al-Bukhari 311