Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1556
Abu Murra narrated on the authority of Umm Hani that the Messenger of Allah (may peace be upon him) on the day of the Conquest of Mecca observed in her house eight rak'abs of prayer in one cloth, its opposite corners having been tied from the opposite sides.