It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to pray at night while I was at his side, and I was menstruating. I had a sheet over me, part of which was over the Prophet (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4119
It is narrated from Sayyidah Maymunah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) prayed with a sheet over him (peace and blessings be upon him), part of which was over his honourable wife, and she was menstruating.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4120
It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) ordered me to hand him the mat (khumrah). I said: I am menstruating. He (peace and blessings be upon him) said: "Your menstruation is not in your hand."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4121
It is narrated from Ikrimah (may Allah have mercy on him) that Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) was asked: If a menstruating woman sweats in her shift during the days of her menstruation, may she pray in that shift? Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: Yes, as long as there is no blood on it. Likewise a man in a state of major impurity (junub) who sweats in his clothes may pray in those same clothes.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4123