It wasnarrated from Abu Sa'eed Al-Khudri that:
The Messenger of Allah(ﷺ) observed I'tifak in a Turkish tent, over the door of whichwas apiece of reed matting. He pushed the mat aside, then he put hisheadout and spoke to the people. (DE)
English reference (DE): Vol. 1, Book 7, Hadith 1775 (DE)
Arabic reference (DE): Book 7, Hadith 1847 (DE)