Leviticus 25:18-22

18“Therefore you are to keep My statutes and observe My ordinances, and carry them out, so that you may live securely in the land.

19Then the land will yield its fruit, and you may eat your fill and live there in safety.

20Now if you ask: What are we to eat during the seventh year if, see, we are not to sow, nor gather in our increase?

21Now I will command My blessing to you in the sixth year, so that it will yield a harvest sufficient for three years.

22When you sow during the eighth year, you will still be eating the old, stored harvest until the harvest of the ninth year comes in.