John Trapp on Job 41:21

Verſe 21. His breath kindleth coals] Or, Would kindle coals (as a Smiths bellows) if there were any to kindle. Such a kindle-coal was Arrius and Hildebrand of old: the Jeſuites at this day, and not a few others, Prov. 26.21. Eſ. 33.10. your breath as fire ſhall devour you. Some mens tongues are like Gun-powder, which touched with the leaſt ſpark, will inſtantly be in the face, Jam. 3.6. A flame goeth out of their mouths, enough to ſet the whole courſe of Nature on fire.