This.

Matthew 12:45
Then it goes and brings with it seven other spirits more evil than itself, and they go in and dwell there; and the final plight of that man is worse than the first. So will it be with this wicked generation."

Matthew 16:28
Truly I tell you, some who are standing here will not taste death until they see the Son of Man coming in His kingdom."

Matthew 23:36
Truly I tell you, all these things will come upon this generation.

Mark 13:30, 31
Truly I tell you, this generation will not pass away until all these things have happened. . . .

Luke 11:50
As a result, this generation will be charged with the blood of all the prophets that has been shed since the foundation of the world,

Luke 21:32, 33
Truly I tell you, this generation will not pass away until all these things have happened. . . .