Ibn Abbas prayed on his rug while he was in Basra, then he told his companions that the Messenger of Allah ﷺ used to pray on his rug.
حدثنا حرملة بن يحيى حدثنا عبد الله بن وهب حدثني زمعة بن صالح
صلى ابن عباس وهو بالبصرة على بساطه ثم حدث أصحابه أن رسول الله ﷺ كان يصلي على بساطه
No references are available.
[Its chain of transmission is daif] See, no. 326, for its defect, and Busiri said, "This is a daif chain of transmission..." The hadith of Bukhari (6203) and Muslim (2150) serves in its place.