'Fast' in the Bible

And they said unto him, The disciples of John fast often, and make supplications; likewise also the disciples of the Pharisees; but thine eat and drink.

And Jesus said unto them, Can ye make the sons of the bride-chamber fast, while the bridegroom is with them?

But the days will come; and when the bridegroom shall be taken away from them, then will they fast in those days.

And that in the good ground, these are such as in an honest and good heart, having heard the word, hold it fast, and bring forth fruit with patience.

I fast twice in the week; I give tithes of all that I get.