Exodus 23:11

but the seventh year you shall let it rest and lie fallow, that the poor of your people may eat; and what they leave the animal of the field shall eat. In the same way, you shall deal with your vineyard and with your olive grove.

Leviticus 25:2-7

"Speak to the children of Israel, and tell them, 'When you come into the land which I give you, then the land shall keep a Sabbath to Yahweh.

Leviticus 25:11-12

That fiftieth year shall be a jubilee to you. In it you shall not sow, neither reap that which grows of itself, nor gather from the undressed vines.

Leviticus 25:20

If you said, "What shall we eat the seventh year? Behold, we shall not sow, nor gather in our increase;"

Leviticus 25:22

You shall sow the eighth year, and eat of the fruits, the old store; until the ninth year, until its fruits come in, you shall eat the old store.

Leviticus 26:34-35

Then the land will enjoy its sabbaths as long as it lies desolate and you are in your enemies' land. Even then the land will rest and enjoy its sabbaths.

Treasury of Scripture Knowledge

Summary

But the seventh year thou shalt let it rest and lie still; that the poor of thy people may eat: and what they leave the beasts of the field shall eat. In like manner thou shalt deal with thy vineyard, and with thy oliveyard.

General references

Bible References

The seventh

Leviticus 25:2
"Speak to the children of Israel, and tell them, 'When you come into the land which I give you, then the land shall keep a Sabbath to Yahweh.
Leviticus 26:34
Then the land will enjoy its sabbaths as long as it lies desolate and you are in your enemies' land. Even then the land will rest and enjoy its sabbaths.

General references

Leviticus 25:4
but in the seventh year there shall be a Sabbath of solemn rest for the land, a Sabbath to Yahweh. You shall not sow your field or prune your vineyard.
Deuteronomy 15:1
At the end of every seven years you shall make a release.