Jeremiah 6:27 - Ellicott's Commentary On The Whole Bible

I have set thee... — The verse is difficult, as containing words in the Hebrew which are not found elsewhere, and have therefore to be guessed at. The following rendering is given on the authority of the most recent commentators, and has the merit of being in harmony with the metallurgic imagery of the following verses. As a prover of ore I have set thee among my people, and thou shalt know and try their way. The words are spoken by Jehovah to the prophet, and describe his work. By others, the first part of the sentence is rendered as follows: As a prover of ore I have set thee like a fortress, as if with a reference to Jeremiah 1:18, where the same word is used.