As for the earth... — While the ploughman and the reaper till and gather the fruits of the earth on its surface, the miner far below maintains perpetual fires, as also does the volcanic mountain, with its fields and vineyards luxuriant and fertile on its sides.
Related Commentaries of Job 28:5
Job 28:5
5 As for the earth, out of it cometh bread: and under it is turned up as it were fire.