The Messenger of Allah ﷺ used to pray on a small prayer mat made of palm fibers.
حدثنا إبراهيم بن أبي العباس حدثنا شريك عن أبي إسحاق عن البهي قال شريك أراه
كان رسول الله ﷺ يصلي على الخمرة
No references are available.
Its isnad is sahih, despite Sharik's uncertainty about whether it is from Ibn Umar, for hadith 5660 has already passed by his route without any uncertainty. This removal of doubt is supported by the hadith of Abu Ishaq from Bahiy from Ibn Umar, that the Prophet said to Ayesha, "Hand me the garment," and so on, and likewise the hadith of Ibn Abu Layla from Nafi from Ibn Umar, both of which have already passed as 5382 and 5589.