'Fast' in the Bible

Now John's disciples and the Pharisees were fasting. So they came to Jesus and said, "Why do the disciples of John and the disciples of the Pharisees fast, but your disciples don't fast?"

Jesus said to them, "The wedding guests cannot fast while the bridegroom is with them, can they? As long as they have the bridegroom with them they do not fast.

But the days are coming when the bridegroom will be taken from them, and at that time they will fast.

(For the Pharisees and all the Jews do not eat unless they perform a ritual washing, holding fast to the tradition of the elders.

And when they come from the marketplace, they do not eat unless they wash. They hold fast to many other traditions: the washing of cups, pots, kettles, and dining couches.)

Having no regard for the command of God, you hold fast to human tradition."