Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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1 Chronicles 24:4

There were more chief men found of the sons of Eleazar than of the sons of Ithamar; and they were divided like this: of the sons of Eleazar there were sixteen, heads of fathers’ houses; and of the sons of Ithamar, according to their fathers’ houses, eight.

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