The Parable of the Faithful Servant (or Parable of the Door Keeper) is a parable of Jesus found in Matthew 24:42-51, Mark 13:34-37, and Luke 12:35-48 about how it is important for the faithful to keep watch.
In Matthew's Gospel, it immediately precedes the Parable of the Ten Virgins, which has a similar eschatological theme of being prepared for the day of reckoning.