[Machine] The Messenger of Allah ﷺ used to pray at night while I was by his side. I was menstruating and had a cloth over me, and some of it was on the Messenger of Allah ﷺ .  

كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي بِاللَّيْلِ وَأَنَا إِلَى جَنْبِهِ وَأَنَا حَائِضٌ وَعَلَيَّ مِرْطٌ وَبَعْضُهُ عَلَى رَسُولِ اللهِ ﷺ  

The Prophet ﷺ prayed on a sheet of cloth put on by one of his wives who was menstruating. He was praying while (a part of) it was upon him. (Using translation from Abū Dāʾūd 369)   

أَنَّ النَّبِيَّ ﷺ صَلَّى وَعَلَيْهِ مِرْطٌ وَعَلَى بَعْضِ أَزْوَاجِهِ مِنْهُ وَهِيَ حَائِضٌ وَهُوَ يُصَلِّي وَهُوَ عَلَيْهِ  

[Machine] The Messenger of Allah ﷺ commanded me to bring him the wine. So I said, "O Messenger of Allah, I am menstruating." He said, "Indeed, your menstruation is not in your hands."  

أَمَرَنِي رَسُولُ اللهِ ﷺ أَنْ أُنَاوِلَهُ الْخُمْرَةَ فَقُلْتُ يَا رَسُولَ اللهِ إِنِّي حَائِضٌ قَالَ إِنَّ حَيْضَتَكِ لَيْسَتْ فِي يَدِكِ  

[Machine] She did not see any harm in the stain of menstrual blood on the garment.  

كَانَتْ لَا تَرَى بَأْسًا بِعَرَقِ الْحَائِضِ فِي الثَّوْبِ  

[Machine] About a woman who experiences menstruation in her garment, and thus has her days of menstruation. Should she pray in it? He said, yes, as long as there is no blood in it. Similarly, a person in a state of ritual impurity sweats on his clothes, so he prays in them.  

عَنِ الْمَرْأَةِ تَحِيضُ فِي دِرْعِهَا فَيَكُونُ عَلَيْهَا أَيَّامَ حَيْضَتِهَا فَتَعْرَقُ فِيهِ أَتُصَلِّي فِيهِ؟ قَالَ نَعَمْ مَا لَمْ يَكُنْ فِيهِ دَمٌ وَكَذَلِكَ الْجُنُبُ يَعْرَقُ فِي ثَوْبِهِ فَيُصَلِّي فِيهِ