I will reduce you to nothing, and you shall not be, and if you are sought, you will no longer be found, in perpetuity, says the Lord God.
Other versions
King James Version
I will make thee a terror, and thou shalt be no more: though thou be sought for, yet shalt thou never be found again, saith the Lord GOD. English Standard Version
I will bring you to a dreadful end, and you shall be no more. Though you be sought for, you will never be found again, declares the Lord GOD."New International Version
I will bring you to a horrible end and you will be no more. You will be sought, but you will never again be found, declares the Sovereign LORD."