Leviticus 25:1-3

¹And the Lord spake with Mosheh in the mountain of Sinai, saying:

²Speak with the children of Israel, and say to them: When you have entered into the land that I will give you, the land shall have rest by an intermission (shemet shemittha) before the Lord.

³Six years thou shalt sow thy field, and six years prune thy vineyard, and gather in its fruit;