عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا أَنَّهَا طَرَقَتْهَا الْحَيْضَةُ وَرَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يُصَلِّي فَأَشَارَتْ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ بِثَوْبٍ وَفِيهِ دَمٌ فَأَشَارَ إِلَيْهَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ وَهُوَ فِي الصَّلَاةِ: اغْسِلِيهِ، فَغَسَلْتُ مَوْضِعَ الدَّمِ ثُمَّ أَخَذَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ ذَلِكَ الثَّوْبَ فَصَلَّى فِيهِ
It is narrated from Sayyida Aisha (RA) that she began menstruating at night while the Messenger of Allah (peace and blessings be upon him) was praying. She gestured towards a piece of cloth to the Messenger of Allah (peace and blessings be upon him), and there was blood on it. The Prophet (peace and blessings be upon him) indicated during the prayer that she should wash it. So she washed the place of the blood, then the Messenger of Allah (peace and blessings be upon him) took that cloth and began to pray in it.