Leviticus 25:2-4

²Speak to the children of Israel, and thou shalt say to them: When you shall have entered into the land which I will give you, observe the rest of the sabbath to the Lord.

³Six years thou shalt sow thy field and six years thou shalt prune thy vineyard, and shalt gather the fruits thereof:

⁴But in the seventh year there shall be a sabbath to the land, of the resting of the Lord: thou shalt not sow thy field, nor prune thy vineyard.