Cross reference
Mark 13:35
35 Watch therefore: for ye know not when the lord of the house cometh, whether at even, or at midnight, or at cockcrowing, or in the morning;
Matthew 24:42
42 Watch therefore: for ye know not on what day your Lord cometh.
Matthew 24:44
44 Therefore be ye also ready; for in an hour that ye think not the Son of man cometh.
Mark 13:33
33 Take ye heed, watch and pray: for ye know not when the time is.
Mark 6:48
48 And seeing them distressed in rowing, for the wind was contrary unto them, about the fourth watch of the night he cometh unto them, walking on the sea; and he would have passed by them:
Mark 14:30
30 And Jesus saith unto him, Verily I say unto thee, that thou to-day, `even' this night, before the cock crow twice, shalt deny me thrice.