Parable of the Watchful Servant: Watching for the master’s return
“It is like a man, traveling to another country, having left his house, and given authority to his servants, and to each one his work, and also commanded the doorkeeper to keep watch. Watch therefore, for you don’t know when the lord of the house is coming, whether at evening, or at midnight, or when the rooster crows, or in the morning; lest coming suddenly he might find you sleeping. What I tell you, I tell all: Watch.”
from Parables topic