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

1 Chronicles 21:3

And Joab said, May the Lord add to his people, a hundred-fold as many as they [are], and [let] the eyes of my lord the king see [it]: all [are] the servants of my lord. Why does my lord seek this thing? [do it not], lest it become a sin to Israel.

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