Mark 13:33-37 Take ye heed, watch and pray: for ye know not when the time is. For the Son of man is as a man taking a far journey, who left his house, and gave authority to his servants, and to every man his work, and commanded the porter to watch. Watch ye therefore: for ye know not when the master of the house cometh, at even, orat midnight, or at the cockcrowing, or in the morning: Lest coming suddenly he find you sleeping.
And what I say unto you I say unto all, Watch.
2 Corinthians 6:2 (For he saith, I have heard thee in a time accepted, and in the day of salvation have I succoured thee: behold, now isthe accepted time; behold, now is the day of salvation.)