Exodus 23:9-11 KJV

[9] Also thou shalt not oppress a stranger: for ye know the heart of a stranger, seeing ye were strangers in the land of Egypt. [10] And six years thou shalt sow thy land, and shalt gather in the fruits thereof: [11] But the seventh year thou shalt let it rest and lie still; that the poor of thy people may eat: and what they leave the beasts of the field shall eat. In like manner thou shalt deal with thy vineyard, and with thy oliveyard.