Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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2 Samuel 20:10

But Amasa took no heed to the sword that was in Joab’s hand. So he struck him with it in the body and shed out his bowels to the ground, and didn’t strike him again; and he died. Joab and Abishai his brother pursued Sheba the son of Bichri.

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