Matthew 4:2; Matthew 6:16-18; Matthew 9:14-15
And when he had fasted forty days and forty nights, he was afterward an hungred .
Moreover when ye fast , be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast . Verily I say unto you , They have their reward.
But thou, when thou fastest , anoint thine head, and wash thy face;
That thou appear not unto men to fast , but unto thy Father which is in secret: and thy Father, which seeth in secret, shall reward thee openly .
Then came to him the disciples of John, saying , Why do we and the Pharisees fast oft, but thy disciples fast not?
And Jesus said unto them, Can the children of the bridechamber mourn , as long as the bridegroom is with them? but the days will come , when the bridegroom shall be taken from them, and then shall they fast .