Luke 5:35

however, the time will come, when the bridegroom shall be taken away from them, and then they will have occasions enow of fasting.

Luke 17:22

At length he said to his disciples, the time will come, when ye will wish to see the son of man appear, and shall not see him.

Matthew 6:17-18

but whenever you fast, anoint your head, and wash your face:

Luke 24:17-21

and he said to them, what is the subject of your debate in the way, and why do you look so sad?

John 12:8

the poor you will always have with you; but me you will not always have.

John 13:33

my dear children, I am with you but for a little while. you shall seek me: but as I said to the Jews, so now I say to you, "where I am going you cannot come."

John 14:3-4

and when I am gone, and have prepar'd a place for you, I will come again, to take you with me, that where I am there ye may be also.

John 16:4-7

but these things have I told you, that when the time shall come, ye may remember what I now tell you. I did not tell you so much at the beginning, because, I was then to be with you.

John 16:16-22

Within a little while ye shall not see me: but within a little while ye shall see me again, because I am going to the father.

John 16:28

I was sent by the father, and am come into the world: but now I leave the world, and am going to my father.

John 17:11-13

and now I shall be no more in the world, but they will be in the world, when I am come to thee. holy father keep them by that authority, with which thou hast invested me, that they may be one, as we are.

Acts 1:9

After this discourse, while they beheld, he was taken up, and a cloud received him out of their sight.

Acts 3:21

but must reside in heaven, till the time of the restitution of all things, of which God has spoken from the beginning by the mouth of his holy prophets.

Acts 13:2-3

as they were ministring to the Lord, and fasting, the holy spirit said to them, separate me Barnabas and Saul, for the work to which I have destin'd them.

Acts 14:23

and after they had by prayers and fastings establish'd Pastors for them in every church, they recommended them to the Lord in whom they had believed.

1 Corinthians 7:5

don't desert one another, unless you mutually consent to retire for a time, to the solemnity of prayer; and then come together again, lest satan make an attempt upon your continency.

2 Corinthians 11:27

expos'd to toil, to fatigue, to frequent watchings, to hunger and thirst, to frequent fastings, to cold and penury.

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 whenever you fast, anoint your head, and wash your face:
Acts 13:2
as they were ministring to the Lord, and fasting, the holy spirit said to them, separate me Barnabas and Saul, for the work to which I have destin'd them.
Acts 14:23
and after they had by prayers and fastings establish'd Pastors for them in every church, they recommended them to the Lord in whom they had believed.
1 Corinthians 7:5
don't desert one another, unless you mutually consent to retire for a time, to the solemnity of prayer; and then come together again, lest satan make an attempt upon your continency.
2 Corinthians 11:27
expos'd to toil, to fatigue, to frequent watchings, to hunger and thirst, to frequent fastings, to cold and penury.