Abu Dawud Book 1, Hadith Number 388.

Chapter : On repeating prayer offered in an impure garment.

Narated By Umm Jahdar al-‘Amiriyyah : Umm Jahdar al-‘Amiriyyah asked ‘Aisha about the blood of menses which drops on the clothe. She replied: I was (lying) with the Apostle of Allah (PBUH) and we has our garment over us, and we had put a blanket over it. When the day broke, the Apostle of Allah (PBUH) took the blanket, wore it and went out and offered the dawn prayer. He then sat in the mosque among the people. A man said: Apostle of Allah, this is a spot of blood. The Apostle of Allah (PBUH) caught hold of it from around and sent it to me folded in the hand of a slave and said: Wash it and dry it and then send it to me. I sent for my vessel and washed it; I then dried it and returned it to him. The Apostle of Allah (PBUH) came at noon while he had blanket over him.