Jacob wanted to marry Laban’s daughter Rachel, but Laban tricked him into marrying Rachel’s sister Leah instead. Then Laban let him marry Rachel too.

Later, it says Rachel gave Jacob her servant Bilhah as a wife. And then Leah gave him her servant Zilpah as a wife. So Jacob had four wives.

But after that, it says Jacob was traveling with “his two wives” and “his two female servants”. Since when does he only have two wives?

A non-explanation

Could Jacob have somehow lost two wives in between the chapter where he got his fourth wife and the chapter that says he had just two wives? No, the chapter after that makes it pretty clear that Rachel, Leah, and the two servants Jacob had children with are all still with Jacob. And a couple chapters later, it confirms that Bilhah specifically is still with Jacob.