The Messenger of Allah ﷺ prayed on a straw mat.
حدثنا أبو كريب حدثنا أبو معاوية عن الأعمش عن أبي سفيان عن جابر
صلى رسول الله ﷺ على حصير
No references are available.
Its chain of transmission was reported by Muslim, Book of Prayer, chapter on praying in a single garment and how to wear it, no. 519, from the hadith of Abu Muawiya and others, with this wording.