Verse 29. The bellows - The prophet prosecutes his metaphor taken from refining of metals, intimating, that the prophets had spent their breath to no purpose, and their strength was consumed by their labour. The lead - The judgments which were heavy, as lead upon them, are all wasted, and do no good. In vain - Let the artist use his greatest skill and industry, yet is it all in vain.
Verse 30. Refuse - Such as will be rejected in payments.