Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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Judges 21:5

The children of Israel said, “Who is there among all the tribes of Israel who didn’t come up in the assembly to Yahweh?” For they had made a great oath concerning him who didn’t come up to Yahweh to Mizpah, saying, “He shall surely be put to death.”

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