Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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1 Chronicles 21:12

either three years of famine; or three months to be consumed before your foes, while the sword of your enemies overtakes you; or else three days of the sword of Yahweh, even pestilence in the land, and Yahweh’s angel destroying throughout all the borders of Israel. Now therefore consider what answer I shall return to him who sent me.’”

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