It will not go into any kind of systematic or chronological order of the Bible (Sincerely). Begin by establishing the fact that fasting is indeed part of the life of the believer of the New Testament.
Matthew 6:16 When you fast, do not be like the hypocrites, with a sad, for they disfigure their faces, that they may appear to men to fast. really I state unto you, they have their reward.
Of course, I put particular emphasis on the phrase "when you fast," said he does not say "if you fast." Jesus ...