[Machine] There was a time when one of us had a shield in which she experienced menstruation, and then you would see a drop of blood in it, so she would scrape it off with her fingernail. This is in regards to a small amount of blood which is forgiven. As for a large amount of it, it is correct to say that she would wash it. And that is mentioned in its proper place, if Allah wills. It has also been narrated from Salman al-Farsi.  

قَدْ كَانَ يَكُونُ لِإِحْدَانَا الدِّرْعُ تَحِيضُ فِيهِ تُصِيبُهَا الْجَنَابَةُ ثُمَّ تَرَى فِيهِ قَطْرَةً مِنْ دَمٍ فَتَقْصَعُهُ بِرِيقِهَا وَهَذَا فِي الدَّمِ الْيَسِيرِ الَّذِي يَكُونُ مَعْفُوًّا عَنْهُ فَأَمَّا الْكَثِيرُ مِنْهُ فَصَحِيحٌ عَنْهَا أَنَّهَا كَانَتْ تَغْسِلُهُ وَذَلِكَ يَرِدُ فِي مَوْضِعِهِ إِنْ شَاءَ اللهُ تَعَالَى ثُمَّ قَدْ رُوِيَ عَنْ سَلْمَانَ الْفَارِسِيِّ