Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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2 Esdras 6:16

that the speech is about them. They will tremble and be moved, for they know that their end must be changed.”

Parallel Translations

KJVView canonical →
And why? because the speech of these things trembleth and is moved: for it knoweth that the end of these things must be changed.
King James Version