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

2 Kings 20:1

In those days was Ezekias sick [even] to death. And the prophet Esaias the son of Amos came in to him, and said to him, Thus saith the Lord, Give charge to thy household; [for] thou shalt die, and not live.

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