2 Chronicles 36:20-21

20He a  took into exile in Babylon those who had escaped from the sword, b  and 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 c  enjoyed its Sabbaths. All the days that it lay desolate d  it kept Sabbath, to fulfill seventy years.

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