John Gill Commentary Proverbs 25:4

"Take away the dross from the silver, And there cometh forth a vessel for the refiner:" — Proverbs 25:4 (ASV)

Take away the dross from the silver
By putting it into the furnace, and purging it from it: and there will come forth a vessel for the finer ;
not out of the furnace, a vessel formed and shaped, but pure silver will come out of it for the refiner; of which a vessel may be made, very honourable, beautiful, and fit for use: the application of it is in (Proverbs 25:5) .