Nu'maan ibn Bashir Radiyallahu 'Anhu says:
"Are you not in the luxuries of eating and drinking, whereas, I had observed that Rasulullah Sallallahu 'Alayhi Wasallam did not possess ordinary types of dates to fill his stomach". (IT)
English reference (IT): Book 50, Hadith 351 (IT)
Arabic reference (IT): Book 52, Hadith 369 (IT)