I tell you, in that night there shall be two [men] in one bed; the one shall be taken, and the other shall be left.
Note 9 at Lu 17:34: There has been much confusion over these few verses. Some say that the ones who are taken are spared the judgment that the others experience, just as Noah (Lu 17:26) and Lot (Lu 17:28) were both removed from the destruction. Others say that it is the ungodly who are taken away in judgment and destroyed and that the godly people are the ones who are left, as in the cases of Noah surviving the Flood and Lot escaping the destruction of Sodom and Gomorrah.
Because of the illustration in Lu 17:37, it is probable that Jesus was speaking of the godly being taken away and the others being left to suffer God's judgment. One point that everyone can agree on is that Jesus was saying that the godly will be spared and the evil will be punished (see note 10 at Lu 17:37).