Luke 5:35

The days will come when the bridegroom is taken away from them, and then they will fast in those days."

Luke 17:22

And he said to the disciples, "The days are coming when you will desire to see one of the days of the Son of Man, and you will not see it.

Isaiah 22:12

In that day the Lord GOD of hosts called for weeping and mourning, for baldness and wearing sackcloth;

Daniel 9:26

And after the sixty-two weeks, an anointed one shall be cut off and shall have nothing. And the people of the prince who is to come shall destroy the city and the sanctuary. Its end shall come with a flood, and to the end there shall be war. Desolations are decreed.

Zechariah 13:7

"Awake, O sword, against my shepherd, against the man who stands next to me," declares the LORD of hosts."Strike the shepherd, and the sheep will be scattered; I will turn my hand against the little ones.

Matthew 6:17-18

But when you fast, anoint your head and wash your face,

Luke 24:17-21

And he said to them, "What is this conversation that you are holding with each other as you walk?" And they stood still, looking sad.

John 12:8

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

John 13:33

Little children, yet a little while I am with you. You will seek me, and just as I said to the Jews, so now I also say to you, 'Where I am going you cannot come.'

John 14:3-4

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

John 16:4-7

But I have said these things to you, that when their hour comes you may remember that I told them to you. "I did not say these things to you from the beginning, because I was with you.

John 16:16-22

"A little while, and you will see me no longer; and again a little while, and you will see me."

John 16:28

I came from the Father and have come into the world, and now I am leaving the world and going to the Father."

John 17:11-13

And I am no longer in the world, but they are in the world, and I am coming to you. Holy Father, keep them in your name, which you have given me, that they may be one, even as we are one.

Acts 1:9

And when he had said these things, as they were looking on, he was lifted up, and a cloud took him out of their sight.

Acts 3:21

whom heaven must receive until the time for restoring all the things about which God spoke by the mouth of his holy prophets long ago.

Acts 13:2-3

While they were worshiping the Lord and fasting, the Holy Spirit said, "Set apart for me Barnabas and Saul for the work to which I have called them."

Acts 14:23

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

1 Corinthians 7:5

Do not deprive one another, except perhaps by agreement for a limited time, that you may devote yourselves to prayer; but then come together again, so that Satan may not tempt you because of your lack of self-control.

2 Corinthians 11:27

in toil and hardship, through many a sleepless night, in hunger and thirst, often without food, in cold and exposure.

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
In that day the Lord GOD of hosts called for weeping and mourning, for baldness and wearing sackcloth;
Matthew 6:17
But when you fast, anoint your head and wash your face,
Acts 13:2
While they were worshiping the Lord and fasting, the Holy Spirit said, "Set apart for me Barnabas and Saul for the work to which I have called them."
Acts 14:23
And when they had appointed elders for them in every church, with prayer and fasting they committed them to the Lord in whom they had believed.
1 Corinthians 7:5
Do not deprive one another, except perhaps by agreement for a limited time, that you may devote yourselves to prayer; but then come together again, so that Satan may not tempt you because of your lack of self-control.
2 Corinthians 11:27
in toil and hardship, through many a sleepless night, in hunger and thirst, often without food, in cold and exposure.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.