Gone down to hell with their weapons of war - Are buried in their armor and with their weapons lying by their sides. It was a very ancient practice, in different nations, to bury a warrior's weapons in the same grave with himself.
And they shall not lie - Better, “Shall they not lie?” or, “Are they not laid?” The custom of burying warriors with their swords, shields, or helmets, raider their heads is well known, and common to most warlike nations.
But their iniquities - They, rested in all the glories of a warrior‘s sepulture, but their sins followed them to the grave.