Luke 5:35

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

Luke 17:22

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

Isaiah 22:12

And in that day did the Lord, Jehovah of hosts, call to weeping, and to mourning, and to baldness, and to girding with sackcloth:

Daniel 9:26

And after the threescore and two weeks shall the anointed one be cut off, and shall have nothing: and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and even unto the end shall be war; desolations are determined.

Zechariah 13:7

Awake, O sword, against my shepherd, and against the man that is my fellow, saith Jehovah of hosts: smite the shepherd, and the sheep shall be scattered; and I will turn my hand upon the little ones.

Matthew 6:17-18

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

Luke 24:17-21

And he said unto them, What communications are these that ye have one with another, as ye walk? And they stood still, looking sad.

John 12:8

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

John 13:33

Little children, yet a little while I am with you. Ye shall seek me: and as I said unto the Jews, Whither I go, ye cannot come; so now I say unto you.

John 14:3-4

And if I go and prepare a place for you, I come again, and will receive you unto myself; that where I am, there ye may be also.

John 16:4-7

But these things have I spoken unto you, that when their hour is come, ye may remember them, how that I told you. And these things I said not unto you from the beginning, because I was with you.

John 16:16-22

A little while, and ye behold me no more; and again a little while, and ye shall see me.

John 16:28

I came out from the Father, and am come into the world: again, I leave the world, and go unto the Father.

John 17:11-13

And I am no more in the world, and these are in the world, and I come to thee. Holy Father, keep them in thy name which thou hast given me, that they may be one, even as we are .

Acts 1:9

And when he had said these things, as they were looking, he was taken up; and a cloud received him out of their sight.

Acts 3:21

whom the heaven must receive until the times of restoration of all things, whereof God spake by the mouth of His holy prophets that have been from of old.

Acts 13:2-3

And as they ministered to the Lord, and fasted, the Holy Spirit said, Separate me Barnabas and Saul for the work whereunto I have called them.

Acts 14:23

And when they had appointed for them elders in every church, and had prayed with fasting, they commended them to the Lord, on whom they had believed.

1 Corinthians 7:5

Defraud ye not one the other, except it be by consent for a season, that ye may give yourselves unto prayer, and may be together again, that Satan tempt you not because of your incontinency.

2 Corinthians 11:27

in labor and travail, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.

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

Isaiah 22:12
And in that day did the Lord, Jehovah of hosts, call to weeping, and to mourning, and to baldness, and to girding with sackcloth:
Matthew 6:17
But thou, when thou fastest, anoint thy head, and wash thy face;
Acts 13:2
And as they ministered to the Lord, and fasted, the Holy Spirit said, Separate me Barnabas and Saul for the work whereunto I have called them.
Acts 14:23
And when they had appointed for them elders in every church, and had prayed with fasting, they commended them to the Lord, on whom they had believed.
1 Corinthians 7:5
Defraud ye not one the other, except it be by consent for a season, that ye may give yourselves unto prayer, and may be together again, that Satan tempt you not because of your incontinency.
2 Corinthians 11:27
in labor and travail, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.

American Standard Version Public Domain