'Aayeshah Radiyallahu 'Anha says:
"Rasulullah Sallallahu 'Alayhi Wasallam never filled his stomach with bread made of barley for two consecutive days till he passed away". (FR)
English reference (FR): Book 24, Hadith 141 (FR)
Arabic reference (FR): Book 25, Hadith 149 (FR)