Deuteronomy 15:18
It should not seem hard to you when you set him free. After all he has given you six years with double the service of a hired man. Jehovah your God will bless you in whatever you do.
Isaiah 16:14
Now Jehovah says: Moab's honor will be despised within three years. I will count them like workers count the years left of their contracts. In spite of their great number, the survivors will be very few and powerless.
Isaiah 21:16
This is what Jehovah says to me: Within one year, as a servant bound by contract would count it, all the pomp of Kedar will come to an end.
Luke 17:7-8
Let us say you have a servant who is plowing or looking after the sheep. Do you tell him to hurry and eat his meal when he comes in from the field?