'Fasting' in the Bible

After fasting for 40 days and 40 nights, he finally became hungry.

“Whenever you fast, don’t be sad-faced like the hypocrites. For they make their faces unattractive so their fasting is obvious to people. I assure you: They’ve got their reward!

'But thou, fasting, anoint thy head, and wash thy face,

so that you don’t show your fasting to people but to your Father who is in secret. And your Father who sees in secret will reward you.

Then Jesus called his disciples unto him, and said, I have compassion on the multitude, because they continue with me now three days, and have nothing to eat: and I will not send them away fasting, lest they faint in the way.

Howbeit this kind goeth not out but by prayer and fasting.