At the brightness [that was] before him his thick clouds passed, hail [stones] and coals of fire.
Ver. 12. At the brightness that was before him, &c.] i.e. At his bright presence, his thick clouds (wherein he was enveloped) passed, or did cleave, as it were, in sunder; whence came hailstones mixed with coals of fire, or lightnings out of the clouds; which God maketh at once airy seas and airy furnaces; fetching fire out of the midst of water, and hard stone out of the midst of thin vapours.