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It was narrated that Nu’man bin Bashir said: “I heard ‘Umar bin Khattab say: ‘I saw the Messenger of Allah (ﷺ) writhing with hunger during the day, and he could not even find the worst of dates with which to fill his stomach.’”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ، حَدَّثَنَا بِشْرُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنْ سِمَاكٍ، عَنِ النُّعْمَانِ بْنِ بَشِيرٍ، قَالَ سَمِعْتُ عُمَرَ بْنَ الْخَطَّابِ، يَقُولُ رَأَيْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَلْتَوِي فِي الْيَوْمِ مِنَ الْجُوعِ مَا يَجِدُ مِنَ الدَّقَلِ مَا يَمْلأُ بِهِ بَطْنَهُ .
sunnah.com