exodus 23:10 And six years thou shalt sow thy land, and shalt gather in the fruits thereof: - Free Bible Online

      10. six years thou shalt sow thy land--intermitting the cultivation of the land every seventh year. But it appears that even then there was a spontaneous produce which the poor were permitted freely to gather for their use, and the beasts driven out fed on the remainder, the owners of fields not being allowed to reap or collect the fruits of the vineyard or oliveyard during the course of this sabbatical year. This was a regulation subservient to many excellent purposes; for, besides inculcating the general lesson of dependence on Providence, and of confidence in His faithfulness to His promise respecting the triple increase on the sixth year (Le 25:20, 21), it gave the Israelites a practical proof that they held their properties of the Lord as His tenants, and must conform to His rules on pain of forfeiting the lease of them.

JFB.