Jami` at-Tirmidhi 2360
جامع الترمذي#2360SahihIbn 'Abbas said:" The Messenger of Allah (s.a.w) would spend many consecutive nights and his family did not have supper, and most of the time their bread was barley bread
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan
Al-AlbaniHasan
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 36:57