You might check those refs. Multiple wives and concubines are clearly contemplated and approved in Jewish law (note: there is no word used for “wife” in either Hebrew or Greek; it’s simply the words man and woman).
If you accuse someone of sexual sin without grounds, btw, then note that is a violation of OT law. You are then able to be tried for what you have accused the other of doing. If accusing adultery, remember it is a capital crime.