Therefore, be on the alert          

  —for you do not know when the master of the house is coming, whether in the evening, at midnight, or when the rooster crows, or in the morning—         

                                                                                       in case he should come suddenly and find you asleep.

                                                     What I say to you I say to all,                                                                 

‘Be on the alert!

Mark  13:35-37