New Living Translation
They will know that I alone am the LORD and that I was serious when I said I would bring this calamity on them.

American Standard Version
And they shall know that I am Jehovah: I have not said in vain that I would do this evil unto them.

Berean Study Bible
And they will know that I am the LORD; I did not declare in vain that I would bring this calamity upon them.

Douay-Rheims Bible
And they shall know that I the Lord have not spoken in vain that I would do this evil to them.

English Revised Version
And they shall know that I am the LORD: I have not said in vain that I would do this evil unto them.

King James Bible
And they shall know that I am the LORD, and that I have not said in vain that I would do this evil unto them.

World English Bible
They shall know that I am Yahweh: I have not said in vain that I would do this evil to them.

Young's Literal Translation
And they have known that I am Jehovah, Not for nought have I spoken to do to them this evil.

Ezekiel 6:10 Additional Translations ...