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

1 Chronicles 12:18

And David went out to meet them, and said to them, If ye are come peaceably to me, let my heart be at peace with you: but if [ye are come] to betray me to my enemies unfaithfully, the God of your fathers look upon it, and reprove it.

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