Matthew 6:16-18

“When you fast, don’t make yourselves look sad like the hypocrites. They put a look of suffering on their faces so that people will see they are fasting. The truth is, that’s all the reward they will get. So when you fast, wash your face and make yourself look nice. Then no one will know you are fasting, except your Father, who is with you even in private. He can see what is done in private, and he will reward you.