Luke 5:35

But the days will come when the bridegroom shall be taken away from them, and then shall 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

Therefore the Lord GOD of the hosts did call in this day unto weeping and to mourning and to baldness and to girding with sackcloth:

Daniel 9:26

And after the sixty-two weeks the Anointed One shall be killed and shall have nothing: (and the ruling people that shall come shall destroy the city and the sanctuary; whose end shall be as a flood, until at the end of the war it shall be cut off with desolation).

Zechariah 13:7

Awake, O sword, upon the pastor and upon the man that is my fellow, said the LORD of the 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 dost fast, anoint thine head, and wash thy face

Luke 24:17-21

And he said unto them, What manner of communications are these that ye have one to another as ye walk and are sad?

John 12:8

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

John 13:33

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

John 14:3-4

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

John 16:4-7

But I have told you these things that when that hour shall come, ye may remember that I told you of them. And I did not say these things unto you 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 go to the Father.

John 16:28

I came forth from the Father and am come into the world; again, I leave the world and go to the Father.

John 17:11-13

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

Acts 1:9

And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight.

Acts 3:21

whom it is certainly necessary that the heaven must receive until the times of restitution of all things, which God has spoken by the mouth of all his holy prophets since the age began.

Acts 13:2-3

As they ministered to the Lord and fasted, the Holy Spirit said, Separate me Barnabas and Saul for the work unto which I have called them.

Acts 14:23

And having ordained elders for them in every congregation and having prayed with fasting, they commended them to the Lord on whom they believed.

1 Corinthians 7:5

Do not defraud one another, except it be with mutual consent for a time, that ye may give yourselves to fasting and prayer and come together again, that Satan not tempt you for your incontinency.

2 Corinthians 11:27

in labour and travail, in many watches, in hunger and thirst, in many fasts, 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
Therefore the Lord GOD of the hosts did call in this day unto weeping and to mourning and to baldness and to girding with sackcloth:
Matthew 6:17
But thou, when thou dost fast, anoint thine head, and wash thy face
Acts 13:2
As they ministered to the Lord and fasted, the Holy Spirit said, Separate me Barnabas and Saul for the work unto which I have called them.
Acts 14:23
And having ordained elders for them in every congregation and having prayed with fasting, they commended them to the Lord on whom they believed.
1 Corinthians 7:5
Do not defraud one another, except it be with mutual consent for a time, that ye may give yourselves to fasting and prayer and come together again, that Satan not tempt you for your incontinency.
2 Corinthians 11:27
in labour and travail, in many watches, in hunger and thirst, in many fasts, in cold and nakedness.