Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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Deuteronomy 31:16

Yahweh said to Moses, “Behold, you shall sleep with your fathers. This people will rise up and play the prostitute after the strange gods of the land where they go to be among them, and will forsake me and break my covenant which I have made with them.

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