Anas said: "Allah’s Messenger said (Allah bless him and give him peace): “I have been put in fear for Allah’s sake, while no one was afraid, and I have been troubled for Allah’s sake, while no one was troubled. Thirty intervals between a night and a day came upon me, and for me and Bilal there was no food for the owner of a liver to eat, except something tucked beneath the Bilal’s armpit.”