Luke 21:7

thereupon they said to him, master, when shall this happen? and by what sign shall we know that the event is coming?

Acts 1:6-7

Being therefore in his presence, they asked him, saying, Lord, is this the time when you will restore again the kingdom to Israel?

Matthew 24:3

And when he was upon the mount of Olives, the disciples came to him in private, and said, tell us when shall these things be? and what shall be the sign of thy coming, and of the end of this age?

Matthew 24:15-16

When ye therefore shall see the abomination of desolation, mention'd by Daniel the prophet, stand about the holy place, (let him that readeth,

Mark 13:3-4

and when he was sitting upon the mount of Olives over-against the temple, Peter, James, John, and Andrew said to him in private, tell us,

Mark 13:14

Now when you shall see the-abomination of desolation, mentioned by the prophet Daniel, establish'd where it ought not to be (let the reader observe) then let those, who are in Judea, flee to the mountains:

Luke 21:20-21

Now when you shall see Jerusalem invested by an army, then be assured that the desolation of it is nigh.

Luke 21:27-28

and then shall they see the son of man come on a cloud, with power and great glory.

Luke 21:32

I tell it you for certain, this generation shall not pass away, till all these things are accomplished.

John 21:21-22

upon seeing him, Peter said to Jesus, Lord, and what shall become of him?

Treasury of Scripture Knowledge

Summary

And they asked him, saying, Master, but when shall these things be? and what sign will there be when these things shall come to pass?

General references

Bible References

When

Luke 21:32
I tell it you for certain, this generation shall not pass away, till all these things are accomplished.
Matthew 24:3
And when he was upon the mount of Olives, the disciples came to him in private, and said, tell us when shall these things be? and what shall be the sign of thy coming, and of the end of this age?
Mark 13:3
and when he was sitting upon the mount of Olives over-against the temple, Peter, James, John, and Andrew said to him in private, tell us,
John 21:21
upon seeing him, Peter said to Jesus, Lord, and what shall become of him?
Acts 1:6
Being therefore in his presence, they asked him, saying, Lord, is this the time when you will restore again the kingdom to Israel?

What

Luke 21:20
Now when you shall see Jerusalem invested by an army, then be assured that the desolation of it is nigh.
Matthew 24:15
When ye therefore shall see the abomination of desolation, mention'd by Daniel the prophet, stand about the holy place, (let him that readeth,
Mark 13:14
Now when you shall see the-abomination of desolation, mentioned by the prophet Daniel, establish'd where it ought not to be (let the reader observe) then let those, who are in Judea, flee to the mountains:

General references

Mark 13:4
when shall this happen? and what will be the sign that this is going to be accomplished?
Luke 21:20
Now when you shall see Jerusalem invested by an army, then be assured that the desolation of it is nigh.