Treasury of Scripture Knowledge
This was fulfilled during the babylonish captivity
2 Chronicles 36:21
This took place to fulfill the Lord's message delivered through Jeremiah. The land experienced its sabbatical years; it remained desolate for seventy years, as prophesied.
but in the seventh year the land must have a Sabbath of complete rest -- a Sabbath to the Lord. You must not sow your field or prune your vineyard.