"As it was in the days of Noah, so shall it be when the Son of Man comes...they suspected nothing 'til the flood came and swept them all away...This is what it will be like when the Son of man comes...one is taken the other left." The question presented was "who is actually left?.
Matthew 24: 37-41
"As it was in Noah's day, so will it be when the son of man comes. for in those days before the Flood people were eating and drinking, taking wives, taking husbands, right up to the day Noah went into the ark, and they suspected nothing till the flood came and SWEPT THEM ALL AWAY. This is what it will be like when the Son of man comes. Then of two men in the fields, one is taken the other left; of two women grinding at the mill, one is taken the other left."