Qatada قتادة · Chapters On Zuhd

"We complained to the Messenger of Allah(s.a.w) of hunger and we raised(our garments ) from our stomachs (exposing) a stone (on each of us). So the Messenger of Allah(s.a.w) raised (his garment exposing) two stones."

"I heard the Messenger of Allah (S.a.w) saying: 'The human does not fill any container that is worse than his stomach. It is sufficient for the son of Adam to eat what will support his back. If this is not possible, then a third for food, a third for drink, and third for his breath."