Shama-il Tirmidhi Chapter 024, Hadith Number 002 (136).
Abu Umaamah Al-Baahili Radiyallahu 'Anhu says: "Bread made of barley was never left over in the house of Rasulullah Sallallahu 'Alayhi Wasallam".
Whenever bread made of barley was prepared, the quantity was so little that there were none left over. There was not enough to fill the stomach. Also Sayyidina Rasulullah Saliallahu 'Alayhi Wasallam used to have many guests and the As-haabus Suffah were permanent guests of Sayyidina Rasuluilah Sallallahu 'Alayhi Wasallam.