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

Deuteronomy 20:8

And the scribes shall speak further to the people, and say, What man [is] he that fears and is cowardly in his heart? Let him go and return to his house, lest he make the heart of his brother fail, as his own.

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