Leviticus 25:19-22

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.