Nabi (Swallallahu Alayhi Wa Sallam) said:
“Every good deed of the children of Adam is increased (in reward) from ten to 700 times”. And Allah Ta’ala says: “Except fasting, for verily it is for me and I will reward it. The fasting person abstains from desire and food for my sake” (Sunan Ibn Mājah, 119)