Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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2 Esdras 15:12

Let Egypt and its foundations mourn, for the plague of the chastisement and the punishment that God will bring upon it.

Parallel Translations

KJVView canonical →
Egypt shall mourn, and the foundation of it shall be smitten with the plague and punishment that God shall bring upon it.
King James Version