An-Nu'man bin Bashir (May Allah be pleased with them) reported:
'Umar bin Al-Khattab (May Allah be pleased with him) spoke at length regarding the worldly prosperity that people had achieved and said: "I saw that the Messenger of Allah (ﷺ) would pass his days in hunger and could not get even degraded dates to fill his stomach".[Muslim].
Arabic/English book reference: Book 1, Hadith 473