Matthew 6:16-18
Jesus said; “Whenever you fast, don’t be gloomy like the hypocrites, because they put on sad faces to show others they are fasting. I tell all of you with certainty, they have their full reward! But when you fast, put oil on your head and wash your face, so that your fasting will not be noticed by others but by your Father who is in the hidden place. And your Father who watches from the hidden place will reward you.”