Solomon Had 1000 Wives?

In this episode, Dr. Betters answers the question, "It's Shaun, thanks for the cool videos, My friends & I were debating the other week about marriage and commandments say thou shalt not commit adultery. NOW our debate was about Abraham / Isaac / Jacob they had more than one wife, also Solomon he had Shocking thousand wives, maybe you could shed some light on this for us, because we said that in Abraham's time they had to repopulate the earth but I'm sure in Solomon's time the earth was already re-populated. We were just a bit confused. Could you maybe shed some light on this because the commandments say thou shalt not commit adultery? Thanks await your response."