A woman asked the Messenger of Allah ﷺ: Messenger of Allah, what do you think if the clothe of any of us smeared with the blood of menstruation; what should she do ? He said: If (the clothe of) any of you is smeared with blood of menstruation, she should scratch it; then she should sprinkle water upon it and then she may pray.
أَنَّهَا قَالَتْ سَأَلَتِ امْرَأَةٌ رَسُولَ اللَّهِ ﷺ فَقَالَتْ يَا رَسُولَ اللَّهِ أَرَأَيْتَ إِحْدَانَا إِذَا أَصَابَ ثَوْبَهَا الدَّمُ مِنَ الْحَيْضَةِ كَيْفَ تَصْنَعُ قَالَ إِذَا أَصَابَ إِحْدَاكُنَّ الدَّمُ مِنَ الْحَيْضِ فَلْتَقْرِصْهُ ثُمَّ لْتَنْضَحْهُ بِالْمَاءِ ثُمَّ لْتُصَلِّي