Leviticus 25:2-4

2“Speak to the children of Israel and say to them, ‘When you come into the land which I am giving you, then the land shall keep a Sabbath to the Lord.

3For six years you shall sow your field, and for six years you shall prune your vineyard and gather in its crop.

4But in the seventh year there shall be a Sabbath of rest for the land, a Sabbath to the Lord; you shall not sow [seed in] your field nor prune your vineyard.