Be ready then; for at a time which you have no thought of the Son of man will come.

Lord, what will be the sign of your coming and of the end of the world?

And while he was seated on the Mountain of Olives, the disciples came to him privately, saying, Make clear to us, when will these things be? and what will be the sign of your coming and of the end of the world?
Matthew 24:3

Be ready then; for at a time which you have no thought of the Son of man will come.
Matthew 24:44