Exodus 10:21: Verse 21
Darkness which may be felt - Probably this was occasioned by a superabundance of aqueous vapors floating in the atmosphere, which were so thick as to prevent the rays of the sun from penetrating through them; an extraordinarily thick mist supernaturally, i.e., miraculously, brought on. An awful emblem of the darkened state of the Egyptians and their king.