Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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2 Chronicles 20:17

You will not need to fight this battle. Set yourselves, stand still, and see the salvation of Yahweh with you, O Judah and Jerusalem. Don’t be afraid, nor be dismayed. Go out against them tomorrow, for Yahweh is with you.’”

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