As for hunger, it is a reduction in food, and one does not eat anything except as much of it as will support his core to worship his Lord in his obligatory prayers. Performing voluntary prayers while sitting, with whatever weakness he finds due to lack of food, is more beneficial, better, and stronger in achieving what he wants from God than the strength that he obtains from food to perform voluntary prayers. Standing, for satiety calls for curiosity, for when the stomach is full, the limbs become overwhelmed and act in curiosity, such as movement, sight, hearing, and speech, and all of these interrupt it from what is intended.