Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX2012

Isaiah 30:15

Thus says the Lord, the Holy Lord of Israel; When you shall turn and mourn, then you shall be saved; and you shall know where you were, when you did trust in vanities: [then] your strength became vain, yet you⌃ would not listen:

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