Matthew 24:44

24:44 Therefore you also must be ready, because the Son of Man will come at an hour when you do not expect him.

Matthew 24:50

24:50 then the master of that slave will come on a day when he does not expect him and at an hour he does not foresee,

sn Jesus made clear that his coming could not be timed, and suggested it would take some time – so long, in fact, that some will not be looking for him any longer (at an hour when you do not expect him).