Luke 18:34

And they did not understand any of this; the words were obscure to them, and they did not know what he meant.

John 12:16

His disciples did not understand this at the time but after Jesus was glorified they remembered that this was said of him in Scripture and that it had happened to him.

Acts 1:7

He said to them, "It is not for you to know times and dates which the Father has fixed by his own authority,

1 Peter 1:11

trying to learn for what possible time the spirit of Christ within them in predicting the sufferings destined for Christ intended them and the glories that were to follow them.

Treasury of Scripture Knowledge

Summary

And I heard, but I understood not: then said I, O my Lord, what shall be the end of these things?

General references

Bible References

But

Luke 18:34
And they did not understand any of this; the words were obscure to them, and they did not know what he meant.
John 12:16
His disciples did not understand this at the time but after Jesus was glorified they remembered that this was said of him in Scripture and that it had happened to him.
Acts 1:7
He said to them, "It is not for you to know times and dates which the Father has fixed by his own authority,
1 Peter 1:11
trying to learn for what possible time the spirit of Christ within them in predicting the sufferings destined for Christ intended them and the glories that were to follow them.

General references

Mark 13:4
"Tell us when this is to happen, and what the sign will be when it is all just going to be carried out."