2 Chronicles 36:21 in the World English Bible
to fulfill the LORD’s word by Jeremiah’s mouth, until the land had enjoyed its Sabbaths. As long as it lay desolate, it kept Sabbath, to fulfill seventy years.
Context
20 And them that had escaped from the sword carried he away to Babylon; where they were servants to him and his sons until the reign of the kingdom of Persia:
21 To fulfil the word of the LORD by the mouth of Jeremiah, until the land had enjoyed her sabbaths: for as long as she lay desolate she kept sabbath, to fulfil threescore and ten years.
22 Now in the first year of Cyrus king of Persia, that the word of the LORD spoken by the mouth of Jeremiah might be accomplished, the LORD stirred up the spirit of Cyrus king of Persia, that he made a proclamation throughout all his kingdom, and put it also in writing, saying,