Therefore...

Therefore, whenever you fast, keep your tongue from telling lies, lower your eyes (not to look lustfully at persons who it is unlawful to look at), do not quarrel with others, do not envy, do not dispute, do not challenge others, do not get angry, do not backbite, do not abuse anyone, do not talk badly, do not be lazy, do not bother others, do not oppress, do not be wasteful, do not torture anyone, and do not ignore the remembrance of God and prayer.

Keep silent, be patient, be truthful, and wait for what God has promised you while you are hopeful of meeting Him. It is incumbent on you to be tranquil, humble, grave, and submissive as a servant afraid of his master, or like hopeful ones, who have purified their hearts from vices and observe openly and secretly what God has forbidden. Entrust yourselves completely to God while you are fasting. It is only then that you have observed fasting for the sake of God and have fulfilled your duties.

If you fail to observe what has been ordained for you, it will be reduced from the reward of your fast. The holy prophet (SAW) heard a women curse her female slave. The messenger of Allah (SAW) ordered food to be brought before the woman and asked her to eat. She said: “I am fasting, O messenger of Allah!” The holy prophet said: “How are you fasting while you are cursing your female slave? Surely, fasting does not just mean to abstain from eating or drinking.