'Aayeshah Radiyallahu 'Anha reports that the bed on which Rasulullah Sallallahu 'Alayhi Wasallam slept was made of leather, in which was filled coir of the palm tree. (FR)
English reference (FR): Book 45, Hadith 311 (FR)
Arabic reference (FR): Book 46, Hadith 328 (FR)