Fasting

And when you fast, do not look dismal like the hypocrites, for they disfigure their faces that their fasting may be seen by men. Truly I say to you, they have their reward. But when you fast, anoint your head and wash your face, that your fasting may not be seen by men, but your Father who is in a secret; and your Father who sees in secret will reward you. (Matthew 6:16-18)