“Therefore thus saith the LORD of hosts, Behold, I will *melt them, and try them; for how shall I do for the daughter of my people?”
A primitive root; to fuse (metal), that is, refine (literally or figuratively): – cast, (re-) fine (-er), founder, goldsmith, melt, pure, purge away, try.
Quoted From Strong’s Exhaustive Concordance of the Bible.
Read the whole chapter. The people of God were in rebellion. Here are two more verses of great hope for those of that time that we can take comfort in even today.