Assuming he was also afflicted with six mothers-in-law, I would think the poor man has suffered enough.
I've only had one MIL. Totally blessed by her (may she RIP), but...
Six at once? No way can that turn out well!
Now THERE is a punishment. Make him live with all six wives and all six mothers in law.
You are projecting onto the Saudis the Western notion of the grouchy mother-in-law.
Something tells me that if the gals are submissive enough to want to be wife number four to a hairy, foul-breathed, disgusting 55-year old Saudi man, then the gal's mother will not be the type to cause any trouble. Perhaps Saudi law allows for honor killings of b-tchy mothers-in-law.
Again, something tells me that in Muslim countries, the mothers-in-law problem is a nonproblem.