'Wives' in the Bible

Only your wives and your little children and your livestock (I know that {you have much livestock}) must stay in your towns that I have given you,

And he must not {acquire many} wives for himself, so that his heart [would] turn aside; and {he must not accumulate silver and gold for himself excessively}.

"If a man has two wives, [and] the one [is] loved and the [other] one [is] disliked and the one loved and the one that is disliked have borne for him sons, if it happens [that] the firstborn son {belongs to the one that is disliked},