Sahih Muslim
The Book Pertaining to Piety and Softening of Hearts (Kitab Al-Zuhd wa Al-Raqaiq)
Book Number: 042 / Hadith Number: 7085
'A'isha reported: Never did the family of Muhammad (may peace be upon him) eat to the fill the bread of barley for two successive days until Allah's Messenger (may peace be upon him) died.