Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX2012

2 Chronicles 13:3

And Abia set the battle in array with an army, with mighty men of war, [even] four hundred thousand mighty men: and Jeroboam set the battle in array against him with eight hundred thousand, [they were] mighty warriors of the host.

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