Anas Radiyallahu 'Anhu says:
"Rasulullah Sallallahu 'Alayhi Wasallam said: 'I have been threatened in the path at a time when no one else was threatened, and I have been harassed so much that no other person had experienced such harassments. I experienced thirty such nights and days wherein I and Bilaal Radiyallahu 'Anhu did not possess a thing, which a living creature can eat, except for the little that was hidden under the armpit of Bilaal Radiyallahu 'Anhu'".
English reference: Book 50, Hadith 357
Arabic reference: Book 52, Hadith 375