Leviticus 25:21-23

21I will appoint my blessing for you in the sixth year, so that it will produce a crop sufficient for three years.

22When you sow in the eighth year, you will be eating from the previous harvest. You will be eating this until the ninth year when its harvest comes in.

23“The land is not to be permanently sold because it is mine, and you are only aliens and temporary residents on my land.