Leviticus 25:20-22

And if ye shall say, What shall we eat the seventh year? behold, we shall not sow, nor gather in our increase; then I will command my blessing upon you in the sixth year, and it shall bring forth fruit for the three years. And ye shall sow the eighth year, and eat of the fruits, the old store; until the ninth year, until its fruits come in, ye shall eat the old store.