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

Jeremiah 42:4

Then Jeremiah the prophet said unto them, I have heard you; behold, I will pray unto the Lord your God according to your words; and it shall come to pass, that whatsoever thing the Lord shall answer you, I will declare it unto you; I will keep nothing back from you.

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