Scripture References for fasting 

16 When you fast, do not look somber as the hypocrites do, for they disfigure their faces to show others they are fasting. Truly I tell you, they have received their reward in full. 17 But when you fast, put oil on your head and wash your face, 18 so that it will not be obvious to others that you are fasting, but only to your Father, who is unseen; and your Father, who sees what is done in secret, will reward you.

1On the twenty-fourth day of the same month, the Israelites gathered together, fasting and wearing sackcloth and putting dust on their heads. 2 Those of Israelite descent had separated themselves from all foreigners. They stood in their places and confessed their sins and the sins of their ancestors. 3 They stood where they were and read from the Book of the Law of the Lord their God for a quarter of the day, and spent another quarter in confession and in worshiping the Lord their God.

33 Just before dawn Paul urged them all to eat. “For the last fourteen days,” he said, “you have been in constant suspense and have gone without food—you haven’t eaten anything. 34 Now I urge you to take some food. You need it to survive. Not one of you will lose a single hair from his head.” 35 After he said this, he took some bread and gave thanks to God in front of them all. Then he broke it and began to eat. 36 They were all encouraged and ate some food themselves. 37 Altogether there were 276 of us on board.

I ate no delicacies, no meat or wine entered my mouth, nor did I anoint myself at all, for the full three weeks.