Matius 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. ¹ 

Matius 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,

[24:44]  ¹ 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).