Leviticus 25:4-8

but during the seventh year the land shall have a Sabbath rest, a Sabbath to the Lord; you shall not sow your field nor prune your vineyard.

You shall not reap your harvest’s aftergrowth, and you shall not gather your grapes of untrimmed vines; the land shall have a sabbatical year.

All of you shall have the Sabbath produce of the land as food; for yourself, your male and female slaves, and your hired worker and your foreign resident, those who live as strangers among you.

Even your cattle and the animals that are in your land shall have all its produce to eat.

‘You are also to count off seven Sabbaths of years for yourself, seven times seven years, so that you have the time of the seven Sabbaths of years, that is, forty-nine years.