Leviticus 25:3

25:3 Six years you may sow your field, and six years you may prune your vineyard and gather the produce,

Leviticus 25:5

25:5 You must not gather in the aftergrowth of your harvest and you must not pick the grapes of your unpruned vines; the land must have a year of complete rest.

Leviticus 25:37

25:37 You must not lend him your money at interest and you must not sell him food for profit.