Exodus 23:10 KJV
 And six years thou shalt sow thy land,  and shalt gather in the fruits thereof:
Exodus 23:11 KJV
 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.
Exodus 23:12 KJV
 Six days thou shalt do thy work,  and on the seventh day thou shalt rest: that thine ox and thine ass may rest, and the son of thy handmaid, and the stranger, may be refreshed.