Leviticus 25:5-8

⁵That which comes to growth of itself may not be cut, and the grapes of your uncared-for vines may not be taken off; let it be a year of rest for the land.

⁶And the Sabbath of the land will give food for you and your man-servant and your woman-servant and those working for payment, and for those of another country who are living among you;

⁷And for your cattle and the beasts on the land; all the natural increase of the land will be for food.

⁸And let seven Sabbaths of years be numbered to you, seven times seven years; even the days of seven Sabbaths of years, that is forty-nine years;