Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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Isaiah 51:6

Lift up your eyes to the heavens, and look at the earth beneath; for the heavens will vanish away like smoke, and the earth will wear out like a garment. Its inhabitants will die in the same way, but my salvation will be forever, and my righteousness will not be abolished.

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