Matthew 24:15-16

"When, therefore, ye see the abomination of the desolation which was spoken of through Daniel the prophet, standing in the holy place, (let him that reads understand),

Matthew 24:32-34

"Now from the fig tree learn the parable; When already its branch becomes tender, and the leaves are putting forth, ye know that the summer is near;

Mark 13:14-16

But when ye see the abomination of desolation standing where it ought not, (let him that reads understand), then let those who are in Judaea flee to the mountains;

Luke 21:20-21

"But when ye see Jerusalem encompassed by armies, then know that her desolation has drawn near.

Luke 21:29-33

And He spake 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
"When, therefore, ye see the abomination of the desolation which was spoken of through Daniel the prophet, standing in the holy place, (let him that reads understand),
Mark 13:14
But when ye see the abomination of desolation standing where it ought not, (let him that reads understand), then let those who are in Judaea flee to the mountains;
Luke 21:20
"But when ye see Jerusalem encompassed by armies, then know that her desolation has drawn near.