Leviticus 25:1-4

And the LORD spoke to Moses on Mount Sinai, saying, “Speak to the children of Israel, and say to them: ‘When you come into the land which I give you, then the land shall keep a sabbath to the LORD. Six years you shall sow your field, and six years you shall prune your vineyard, and gather its fruit; but in the seventh year there shall be a sabbath of solemn rest for the land, a sabbath to the LORD. You shall neither sow your field nor prune your vineyard.