Heavenly cure for diseases

O Children of Adam! Take your adornment (by wearing your clean clothes), while praying[] and going round (the Tawâf of ) the Ka'bah, and eat and drink but waste not by extravagance, certainly He (Allâh) likes not Al-Musrifûn (those who waste by extravagance).

Al a'raaf 31

Comment
It is now accpeted through medical science that many diseases spring from food.and eating more than the need,causes the man to be fat and causes constipation in many cases.Both of these are considered the mother of diseases.Therefor Allah says not to exceed in eating habits.