Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX

2 Chronicles 21:9

And Joram went with the princes, and all the cavalry with him: and it came to pass that he arose by night, and smote Edom that compassed him about, and the captains of the chariots, and the people fled to their tents.

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