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

Isaiah 47:10

for thy trusting in wickedness: for thou saidst, I am, and there is not another: know thou, the understanding of these things and thy harlotry shall be thy shame; for thou saidst in thy heart, I am, and there is not another.

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