(6) بَاب التَّوَاضُعِ فِي اللِّبَاسِ وَالِاقْتِصَارِ عَلَى الْغَلِيظِ مِنْهُ وَالْيَسِيرِ فِي اللِّبَاسِ وَالْفِرَاشِ وَغَيْرِهِمَا
A'isha reported that the pillow on which Allah's Messenger (ﷺ) reclined was of leather stuffed with palm fibre.
Reference: Sahih Muslim 2082 a
In-book reference: Book 37, Hadith 61
USC-MSA web (English) reference(deprecated numbering scheme): Book 24, Hadith 5185