Matthew 25:13 KJV
Watch therefore, for ye know neither the day nor the hour wherein the Son of man cometh.
Mark 13:35 KJV
Watch ye therefore: for ye know not when the master of the house cometh, at even, or at midnight, or at the cockcrowing, or in the morning:
Luke 21:36 KJV
Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.
1 Thessalonians 5:6 KJV
Therefore let us not sleep, as do others; but let us watch and be sober.