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

2 Chronicles 6:16

And now, Lord God of Israel, keep with thy servant David my father the things which thou spokest to him, saying, There shall not fail thee a man before me sitting on the throne of Israel, if only thy sons will take heed to their way to walk in my law, as thou didst walk before me.

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