Shama-il Tirmidhi Chapter 024, Hadith Number 007 (141).
'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".
This is the same hadith that was mentioned in the beginning of the chapter. The only difference is, there the whole household was mentioned, here only Sayyidina Rasulullah Sallallahu 'Alayhi Wasallam himself is mentioned. The aim is the same. Sayyidina Rasulullah Sallallahu 'Alayhi Wasallam preferred a simple life for himself and his family. There was not so much, that all could fill their stomachs. Even if there was something available it was given to the poor.