Narrated by:Asma' bint Abi Bakr said
It was narrated that Asma' bint Abi Bakr said:"The Messenger of Allah was asked about menstrual blood that gets on clothing. He said: 'Rub it off, wash it and perform prayer in (the garment).'"
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو خَالِدٍ الأَحْمَرُ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ فَاطِمَةَ بِنْتِ الْمُنْذِرِ، عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ الصِّدِّيقِ، قَالَتْ سُئِلَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ عَنْ دَمِ الْحَيْضِ يَكُونُ فِي الثَّوْبِ قَالَ " اقْرُصِيهِ وَاغْسِلِيهِ وَصَلِّي فِيهِ " .
IbnMaja
The Book of Purification and its Sunnah • Hadith 629