Sayyidah Maymunah (may Allah be pleased with her) said: The Prophet (peace and blessings be upon him) would pray in his mosque on his khumrah, and his (peace and blessings be upon him) hand would touch me while I was sleeping at his (peace and blessings be upon him) side and was menstruating.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20425