Leviticus 25:19-25:24

The land shall yield its fruit and you shall eat your fill, and you shall live upon it in security. And should you ask, "What are we to eat in the seventh year, if we may neither sow nor gather in our crops?" I will ordain My blessing for you in the sixth year, so that it shall yield a crop sufficient for three years. When you sow in the eighth year, you will still be eating old grain of that crop; you will be eating the old until the ninth year, until its crops come in. But the land must not be sold beyond reclaim, for the land is Mine; you are but strangers resident with Me. Throughout the land that you hold, you must provide for the redemption of the land.