Leviticus 25:6

3 Six years you shall sow your field, and six years you shall prune your vineyard, and gather in the fruits of it;

4 but in the seventh year shall be a Sabbath of solemn rest for the land, a Sabbath to Yahweh: you shall neither sow your field, nor prune your vineyard.

5 That which grows of itself of your harvest you shall not reap, and the grapes of your undressed vine you shall not gather: it shall be a year of solemn rest for the land.

6 The Sabbath of the land shall be for food for you; for you, and for your servant and for your maid, and for your hired servant and for your stranger, who sojourn with you.

7 For your cattle, and for the animals that are in your land, shall all the increase of it be for food.

8 You shall number seven Sabbaths of years to you, seven times seven years; and there shall be to you the days of seven Sabbaths of years, even forty-nine years.

9 Then shall you send abroad the loud trumpet on the tenth day of the seventh month; in the day of atonement shall you send abroad the trumpet throughout all your land.