I wasn't even looking for this, and perhaps it's not the most perfect example, but I started to continue my way thru Judges and just happened to be at chapter 19.
It gives the story of a woman who is categorized as a concubine (which most of us would agree was a specific kind of a wife) who left her husband to return to her fathers house and after 4 months the husband comes to "speak friendly" to her to convince her to come back home....It's interesting that the husbands approach doesn't seem to imply that he had any rights over her and that she had the final say if she returned.
Indeed, that is very un-wifely behavior when compared to the rest of scripture.
I've been studying concubinage in my attempt to better understand what marriage is Biblically as the difference between the two is illustrative. This is one of those areas where the scriptures leave out more than they say.
Historically, Hebrew marriage came with a lot of terms. You needed the agreement of the father, there was an often detailed contract, a betrothal, dowry and then dissolution was only under certain conditions and she left only such goods as specified in the contract; all negotiated in advance between father and son-in-law and seemingly without judicial oversight. Just about everything modern marriage isn't.
Concubinage on the other hand was different. Its status and details varied between cultures and through time. Sometimes it was little more than a girlfriend or mistress (sometimes live in, often not), in some cultures it was a slave girl and in others a lower status wife. Often it is exclusive but virtually always not considered a wife. In general for most cultures concubines were what we'd call a mistress and the Hebrews weren't far from this.
Hebrew concubines were exclusive and usually, but not always, lived in the home. They bore legitimate children. Biblical examples are often slaves but not necessarily so. Extra-Biblical sources document that they were without contract, dowry, betrothal, or marriage ceremony and could leave or be sent away at will; going empty handed (though a slave generally couldn't just leave).
You could define concubinage as a low status marriage (being exclusive, live-in, with legitimate children) but it really wasn't marriage, lacking almost all its trappings and having its own separate term. Being an exclusive relationship a concubine held a middle ground between marriage and harlotry. Marriage vs. concubinage was very much analogous to the modern difference between a licensed and ceremonied marriage and an exclusive long term relationship (what most Christians would call 'living in sin').
The word concubine in Hebrew is a loan word usually stated to be of uncertain source and meaning. But it likely traces to words in several very ancient languages, which give the sense (though in very unflattering terms) of concubines being attractive, non-virginal woman who seduced a man. In other words, it was a relationship freely founded on romance and not arranged with the father of a virgin as was typical.
So in many ways the practice of modern marriage is closer to the Hebrew concept of concubinage than of marriage. Modern marriage does have the ceremony and social/legal status of ancient marriage but in formation/dissolution it looks much more like concubinage.