2 Chronicles 36:20-21

20He atook into exile in Babylon those who had escaped from the sword, band they became servants to him and to his sons until the establishment of the kingdom of Persia, 21to fulfill the word of the Lord by the mouth of Jeremiah, until the land had cenjoyed its Sabbaths. All the days that it lay desolate dit kept Sabbath, to fulfill seventy years.

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