Fast in Secret
Fasting is not theatre; it is a hidden act before God.
Jesus assumes fasting but forbids public signalling, directing the practice toward the Father who sees in secret.
Scripture
Matthew 6:16-18
16 "Moreover when you fast, don't be like the hypocrites, with sad faces. For they disfigure their faces, that they may be seen by men to be fasting. Most certainly I tell you, they have received their reward.
17 But you, when you fast, anoint your head, and wash your face;
18 so that you are not seen by men to be fasting, but by your Father who is in secret, and your Father, who sees in secret, will reward you.