Matthew 6:16-18

v.16-18 As with giving (v.2-4) and praying (v.5-15), fasting is a matter between your heart and God. Don’t let others know you are fasting in order to be seen by them (or you will have your reward in full). Fasting involves devoting yourself to God and worshiping him; not just depriving yourself of food for a time. Fasting should be done in secret so God, who sees in secret, can reward you. Don’t go about in a mess or with some visible sign of your fasting. Wash your hair and put on clean clothes.

Read Matthew 6:16-18