Khallas al-Hujari reported: Aisha said: I and the Messenger of Allah ﷺ used to pass night in one (piece of) cloth (on me) while I menstruated profusely. If anything from me (i.e. blood) smeared him (i.e. his body), he would wash that spot and would not exceed it (in washing), then he would offer prayer with it. (Using translation from Abū Dāʾūd 269)
سَمِعْتُ عَائِشَةَ تَقُولُ كُنْتُ أَنَا وَرَسُولُ اللهِ ﷺ نَبِيتُ فِي الشِّعَارِ الْوَاحِدِ وَأَنَا حَائِضٌ طَامِثٌ فَإِنْ أَصَابَهُ مِنِّي شَيْءٌ غَسَلَ مَكَانَهُ وَلَمْ يَعْدُهُ وَصَلَّى فِيهِ