“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.” (Using translation from Ibn Mājah 3347)
أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَبِيتُ اللَّيَالِيَ قَالَ عَبْدُ الصَّمَدِ الْمُتَتَابِعَةَ طَاوِيًا وَأَهْلُهُ لَا يَجِدُونَ عَشَاءً وَكَانَ عَامَّةُ خُبْزِهِمْ خُبْزَ الشَّعِيرِ