Matthew 24:15-16

Then when you may see the abomination of desolation, spoken of by Daniel the prophet, standing in the holy place (let him that readeth know),

Matthew 24:32-34

But learn the parable from the fig-tree: when her branch may now be tender, and she may grow out leaves, know that the summer is nigh.

Mark 13:14-16

And when you may see the abomination of desolation standing where it ought not (let him that readeth know), then let those in Judea fly to the mountains:

Luke 21:20-21

And when you may see Jerusalem shut up by the armies, then know that her desolation is nigh.

Luke 21:29-33

And He spoke a parable to them: Behold the fig-tree, and all the trees:

Treasury of Scripture Knowledge

Summary

And this shall be a sign unto you, saith the LORD, that I will punish you in this place, that ye may know that my words shall surely stand against you for evil:

Bible References

A sign

Matthew 24:15
Then when you may see the abomination of desolation, spoken of by Daniel the prophet, standing in the holy place (let him that readeth know),
Mark 13:14
And when you may see the abomination of desolation standing where it ought not (let him that readeth know), then let those in Judea fly to the mountains:
Luke 21:20
And when you may see Jerusalem shut up by the armies, then know that her desolation is nigh.