A Christian physician once asked Imam Sadiq (a.s.) "Is there anything concerning health in your Quran and in the instructions of your Prophet?" Imam Sadiq (a.s.) told him, "Yes! In the Quran man is told: Eat and drink, but in eating and drinking don't be immoderate.
' and our Prophet has told us: Don't eat until hungry for it is the source of all illnesses.
while eating little and wisely is the source of all cures.
''' The Christian physician stood up and said, What good and perfect health instructions your Quran contains! And what a sensible recommendation your Prophet has made about health."
' Allah Tells us: "Eat and Drink; But Don't be Immoderate."