Nabi memerintahkan untuk mencuci pakaian dan membersihkannya dari najis sebelum shalat
Imam Darimi : 996أَخْبَرَنَا يَزِيدُ بْنُ هَارُونَ عَنْ هِشَامٍ الدَّسْتَوَائِيِّ عَنْ حَمَّادٍ عَنْ إِبْرَاهِيمَ فِيمَا تَلْبَسُ الْمَرْأَةُ مِنْ الثِّيَابِ وَهِيَ حَائِضٌ إِنْ أَصَابَهُ دَمٌ غَسَلَتْهُ وَإِلَّا فَلَيْسَ عَلَيْهَا غَسْلُهُ وَإِنْ عَرِقَتْ فِيهِ فَإِنَّهُ يُجْزِئُهَا أَنْ تَنْضَحَهُ
Narrated to us [Yazid bin Harun] reported to us from [Hisham Ad dastawa`i] from [Hammad] from [Ibrahim] about the clothes a woman wears while she is menstruating: "If blood gets on it, she must wash it, and if it does not, she does not have to wash it, and if she sweats on it, she just sprinkles (water) on it.