جامع الترمذي

Anas narrated that the Messenger of Allah (s.a.w) said: "Indeed I have feared for the sake of Allah, such that no one has feared, and I have been harmed for the sake of Allah, such that no one has been harmed. Thirty days and nights have passed over me, and there was no food with Bilal and I forced something with a liver to eat, except what Bilal could conceal under his armpit."

This Hadith refers to when the Prophet (ﷺ) SAW went out fleeing from Makkah and Bilal was with him. The only food Bilãl had was what he could carry under his arm.