Deuteronomy 15:18
Don't view this as a hardship for yourself when you set him free, for he will have served you for six years twice the time of a paid worker. Then the LORD will bless you in all that you do."
Isaiah 16:14
But now the LORD has spoken again: "Within three years, like the years of a contract worker, Moab's glory will be brought into contempt, in spite of all its great multitude, and its survivors will be very few and of no importance."
Isaiah 21:16
For this is what the LORD is saying to me: "Within three years, according to the years of a contract worker, the pomp of Kedar will come to an end.
Luke 17:7-8
"Suppose a man among you has a servant plowing or watching sheep. Would he say to him when he comes in from the field, "Come at once and have something to eat'?