Do not limit the benefits of fasting merely to abstinence from food, for a true fast means refraining from evil.
Blessed be the LORD, that hath given rest unto his people Israel, according to all that he promised: there hath not failed one word of all his good promise, which he promised by the hand of Moses his servant.
1 Kings 8:56
The King James Version
You will always have joy in the evening if you spend the day fruitfully.