I’m thinking about the scripture where Paul talks about it being better for a man to not marry, but if he must then let him have his own wife.
I would think this would imply just one wife - not many
1 Corinthians 7
1Now concerning the things whereof ye wrote unto me: It is good for a man not to touch a woman.
2Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
Side note: do you think this is where the Catholics get the impression that priests should not marry?
Best,
Mike