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

1 Samuel 26:15

And David said to Abenner, [Art] not thou a man? and who [is] like thee in Israel? Why then dost thou not guard thy lord the king? for one out of the people went in to destroy thy lord the king.

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