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

Judges 11:8

And the elders of Galaad said to Jephthae, Therefore have we now turned to thee, that thou shouldest go with us, and fight against the sons of Ammon, and be our head over all the inhabitants of Galaad.

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