Luke 5:35

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

Luke 17:22

And he said unto his disciples, 'Days will come, when ye shall desire to see one of the days of the Son of Man, and ye shall not behold it;

Isaiah 22:12

And call doth the Lord, Jehovah of Hosts, In that day, to weeping and to lamentation, And to baldness and to girding on of sackcloth,

Daniel 9:26

And after the sixty and two weeks, cut off is Messiah, and the city and the holy place are not his, the Leader who hath come doth destroy the people; and its end is with a flood, and till the end is war, determined are desolations.

Zechariah 13:7

Sword, awake against My shepherd, And against a hero -- My fellow, An affirmation of Jehovah of Hosts. Smite the shepherd, and scattered is the flock, And I have put back My hand on the little ones.

Matthew 6:17-18

'But thou, fasting, anoint thy head, and wash thy face,

Luke 24:17-21

and he said unto them, 'What are these words that ye exchange with one another, walking, and ye are sad?'

John 12:8

for the poor ye have always with yourselves, and me ye have not always.'

John 13:33

Little children, yet a little am I with you; ye will seek me, and, according as I said to the Jews -- Whither I go away, ye are not able to come, to you also I do say it now.

John 14:3-4

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

John 16:4-7

But these things I have spoken to you, that when the hour may come, ye may remember them, that I said them to you, and these things to you from the beginning I did not say, because I was with you;

John 16:16-22

a little while, and ye do not behold me, and again a little while, and ye shall see me, because I go away unto the Father.'

John 16:28

I came forth from the Father, and have come to the world; again I leave the world, and go on unto the Father.'

John 17:11-13

and no more am I in the world, and these are in the world, and I come unto Thee. Holy Father, keep them in Thy name, whom Thou hast given to me, that they may be one as we;

Acts 1:9

And these things having said -- they beholding -- he was taken up, and a cloud did receive him up from their sight;

Acts 3:21

whom it behoveth heaven, indeed, to receive till times of a restitution of all things, of which God spake through the mouth of all His holy prophets from the age.

Acts 13:2-3

and in their ministering to the Lord and fasting, the Holy Spirit said, 'Separate ye to me both Barnabas and Saul to the work to which I have called them,'

Acts 14:23

and having appointed to them by vote elders in every assembly, having prayed with fastings, they commended them to the Lord in whom they had believed.

1 Corinthians 7:5

Defraud not one another, except by consent for a time, that ye may be free for fasting and prayer, and again may come together, that the Adversary may not tempt you because of your incontinence;

2 Corinthians 11:27

in labouriousness and painfulness, in watchings many times, in hunger and thirst, in fastings many times, 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 call doth the Lord, Jehovah of Hosts, In that day, to weeping and to lamentation, And to baldness and to girding on of sackcloth,
Matthew 6:17
'But thou, fasting, anoint thy head, and wash thy face,
Acts 13:2
and in their ministering to the Lord and fasting, the Holy Spirit said, 'Separate ye to me both Barnabas and Saul to the work to which I have called them,'
Acts 14:23
and having appointed to them by vote elders in every assembly, having prayed with fastings, they commended them to the Lord in whom they had believed.
1 Corinthians 7:5
Defraud not one another, except by consent for a time, that ye may be free for fasting and prayer, and again may come together, that the Adversary may not tempt you because of your incontinence;
2 Corinthians 11:27
in labouriousness and painfulness, in watchings many times, in hunger and thirst, in fastings many times, in cold and nakedness;