It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said to her: "Hand me the mat." She said: I am menstruating. He (peace and blessings be upon him) said: "Your menstruation is not in your hand." So I handed it to him (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 883