'A'isha reported: A woman asked the Apostle of Allah ﷺ how to wash herself after menstruation. She mentioned that he taught her how to take bath and then told her to take a piece of cotton with musk and purify herself. She said: How should I purify myself with that? He (the Holy Prophet) said: Praise be to Allah, purify yourself with it, and covered his face, Sufyan b. 'Uyaina gave a demonstration by covering his face (as the Holy Prophet had done). 'A'isha reported: I dragged her to my side for I had understood what the Apostle of Allah ﷺ intended and, therefore, said: Apply this cotton with musk to the trace of blood. Ibn 'Umar in his hadith (has mentioned the words of 'A'isha thus): Apply it to the marks of blood.

حَدَّثَنَا عَمْرُو بْنُ مُحَمَّدٍ النَّاقِدُ، وَابْنُ أَبِي عُمَرَ، جَمِيعًا عَنِ ابْنِ عُيَيْنَةَ، - قَالَ عَمْرٌو حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، - عَنْ مَنْصُورٍ ابْنِ صَفِيَّةَ، عَنْ أُمِّهِ، عَنْ عَائِشَةَ، قَالَتْ سَأَلَتِ امْرَأَةٌ النَّبِيَّ ﷺ كَيْفَ تَغْتَسِلُ مِنْ حَيْضَتِهَا قَالَ فَذَكَرَتْ أَنَّهُ عَلَّمَهَا كَيْفَ تَغْتَسِلُ ثُمَّ تَأْخُذُ فِرْصَةً مِنْ مِسْكٍ فَتَطَهَّرُ بِهَا . قَالَتْ كَيْفَ أَتَطَهَّرُ بِهَا قَالَ " تَطَهَّرِي بِهَا . سُبْحَانَ اللَّهِ " . وَاسْتَتَرَ - وَأَشَارَ لَنَا سُفْيَانُ بْنُ عُيَيْنَةَ بِيَدِهِ عَلَى وَجْهِهِ - قَالَ قَالَتْ عَائِشَةُ وَاجْتَذَبْتُهَا إِلَىَّ وَعَرَفْتُ مَا أَرَادَ النَّبِيُّ ﷺ فَقُلْتُ تَتَبَّعِي بِهَا أَثَرَ الدَّمِ . وَقَالَ ابْنُ أَبِي عُمَرَ فِي رِوَايَتِهِ فَقُلْتُ تَتَبَّعِي بِهَا آثَارَ الدَّمِ .