Whatever the Messenger of Allah صلى الله عليه و سلم received, he distributed to others. He did not keep any provisions for meals. When there was no food to eat, he would tie a stone around his stomach. This was a common Arab custom which helped ease the pain of hunger.
Once, some Sahabah (The Prophet's companions) went to the Messenger of Allah صلى الله عليه و سلم. They had not eaten for several days. They lifted their shirts and showed the Messenger of Allah صلى الله عليه و سلم that they had tied stones around their waists. The Prophet صلى الله عليه و سلم lifted his shirt and showed them that he tied not one, but two stones.
The Sahabah understood that their Prophet صلى الله عليه و سلم deserved to eat even more than themselves. So long as he had provisions available, he would always entertain his guests and share what he had with them.
[Source: Sahih Muslim]
