Simak b. Barb reported:
I heard Nu'man deliver an address in which he said that (Hadrat) Umar made a mention of what had fallen to the lot of people out of the material world and he said: I saw Allah's Messenger (ﷺ) spend the whole day being upset because of hunger and he could not get even an interior quality of dates with which he could fill his belly.
Reference: Sahih Muslim 2978
In-book reference: Book 55, Hadith 45
USC-MSA web (English) reference(deprecated numbering scheme): Book 42, Hadith 7101