I came in upon the Messenger of Allah ﷺ while he was praying on a mat and prostrating on it.
حدثنا محمد بن عبيد حدثنا الأعمش عن أبي سفيان عن جابر
دخلت على رسول الله ﷺ وهو يصلي على حصير ويسجد عليه
No references are available.
Its isnad is sahih. Abu Sufyan is Talha bin Nafi Wasiti Iskaf, and he is truthful, his hadith is found in the collections of the group, and the hadith was mentioned previously at 11013.