'Fast' in the Bible

Love is to be sincere and active [the real thing—without guile and hypocrisy]. Hate what is evil [detest all ungodliness, do not tolerate wickedness]; hold on tightly to what is good.

For whatever was written in earlier times was written for our instruction, so that through endurance and the encouragement of the Scriptures we might have hope and overflow with confidence in His promises.