What did Jeremiah prophesy about the land enjoying its Sabbaths?
Jeremiah foretold that the land would enjoy her Sabbaths for as long as it lay desolate, keeping Sabbath to fulfill seventy years, called three score and ten years. This related to the sabbatical year, when every seventh year the farmland was to be left fallow and not cropped.
Les explains that Jeremiah had foretold the land would enjoy her Sabbaths as long as she lay desolate; she kept Sabbath to fulfill three score and ten years, which is 70 years. He notes this connects to God's law that every seventh year the farmland be left fallow and not cropped, the sabbatical year. Israel had not been in the land very long before greed got the best of them, and the seventy years of desolation let the land keep its Sabbaths.