'Fasting' in the Bible

And the disciples of John and those of the Pharisees were fasting, and they come and say to him, 'Wherefore do the disciples of John and those of the Pharisees fast, and thy disciples do not fast?'

and if I shall let them away fasting to their home, they will faint in the way, for certain of them are come from far.'

And he said to them, 'This kind is able to come forth with nothing except with prayer and fasting.'