It was narrated that Ibn ‘Abbas said:

“The Messenger of Allah (ﷺ) used to spend many nights in a row hungry and his family could find no supper, and usually their bread was barley bread.”

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُعَاوِيَةَ الْجُمَحِيُّ، حَدَّثَنَا ثَابِتُ بْنُ يَزِيدَ، عَنْ هِلاَلِ بْنِ خَبَّابٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَبِيتُ اللَّيَالِيَ الْمُتَتَابِعَةَ طَاوِيًا وَأَهْلُهُ لاَ يَجِدُونَ الْعَشَاءَ وَكَانَ عَامَّةَ خُبْزِهِمْ خُبْزُ الشَّعِيرِ ‏.‏