The pillow that the Messenger of Allah ﷺ used to recline upon was made of leather stuffed with palm fibers.
كان وسادة رسول الله ﷺ التي يتكئ عليها من أدم حشوها ليف.
Muslim narrated it in the Book of Clothing (37:2082) from Abu Bakr bin Abu Shayba, who said, Abdah bin Sulayman narrated to us, from Hisham bin Urwa, from his father, from Ayesha, who said, and she mentioned it.