Luke 5:35

but the days will come, when the bridegroom shall be taken from them, then they will fast.

Luke 17:22

And He said to the disciples, the time will come, when ye shall desire to see one of the days of the Son of man, and shall not see it.

Matthew 6:17-18

But thou, when thou fastest, anoint thine head and wash thy face;

Luke 24:17-21

And He said unto them, What subjects are these, which ye are discoursing of to one another as ye walk, and why are ye sorrowful?

John 12:8

For the poor ye have always with you, but me ye have not always.

John 13:33

Little children, I am to be with you but a little while longer. Ye will wish for me, and as I said to the Jews, "Whither I go ye cannot come", so I now tell you.

John 14:3-4

And as I go to prepare a place for you, I will come again, and receive you to myself, that where I am, ye may also be.

John 16:4-7

But I have told you these things, that when the time cometh, ye may remember that I told you of them. Though I did not tell you of them at the beginning, because I was with you.

John 16:16-22

A little while and ye shall not see me: and again a little while and ye shall see me, because I am going to the Father.

John 16:28

and am come into the world: but now I am leaving the world again, and am going to the Father.

John 17:11-13

And as I am to be no longer in the world, but these are in the world, and I am coming to Thee, Holy Father, keep by thy name those whom Thou hast given me, that they may be one, as we are.

Acts 1:9

And having said these things, as they were looking upon Him, He was lifted up, and a cloud received Him out of their sight.

Acts 3:21

whom heaven must indeed receive till the times of settling all things, of which God hath spoken by the mouth of all his holy prophets from the beginning.

Acts 13:2-3

and as they were ministring to the Lord, and fasting, the holy Spirit said, Separate me Barnabas and Saul, for the work to which I have called them.

Acts 14:23

And when they had appointed them elders in every church, praying and fasting, they recommended them to the Lord, in whom they had believed.

1 Corinthians 7:5

Do not withdraw from one another, unless by consent for a season, that ye may attend to fasting and prayer: and come together again, least Satan tempt you through your incontinency.

2 Corinthians 11:27

in labor and toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness: and beside these outward troubles,

Treasury of Scripture Knowledge

Summary

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

Bible References

And

Matthew 6:17
But thou, when thou fastest, anoint thine head and wash thy face;
Acts 13:2
and as they were ministring to the Lord, and fasting, the holy Spirit said, Separate me Barnabas and Saul, for the work to which I have called them.
Acts 14:23
And when they had appointed them elders in every church, praying and fasting, they recommended them to the Lord, in whom they had believed.
1 Corinthians 7:5
Do not withdraw from one another, unless by consent for a season, that ye may attend to fasting and prayer: and come together again, least Satan tempt you through your incontinency.
2 Corinthians 11:27
in labor and toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness: and beside these outward troubles,