مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3523
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn '‘Abbas (رضي الله عنه) that The Messenger of Allah (ﷺ) used to go to bed hungry for several nights- 'Abdus-Samad said: in a row - and his family could find no supper. And most of their bread was barley bread.
Musnad Ahmad 3545Its isnad is saheeh]