Bible Verses About The Second Coming of Christ: Should watch for

Watch ye therefore, because you know not what hour your Lord will come.

Watch ye therefore (for you know not when the lord of the house cometh, at even, or at midnight, or at the cock crowing, or in the morning):

Lest coming on a sudden, he find you sleeping.

And what I say to you, I say to all: Watch.

Watch ye, therefore, praying at all times, that you may be accounted worthy to escape all these things that are to come and to stand before the Son of man.