What does "What the Devil hath joined together let no man cut asunder" mean?

I am confused Jack. What is this verse?

its the tagline from the movie “sisters” from the director Brian de Palma. I assure you, it is not homework(it does sound like it, eh?), but i need to know what this has to do with anything about twins/relationships.

It’s a twist on the Bible verse “What God hath joined togehter let no man cut asunder.” So I am assuming there is some form of evil in these twins and Satan has joined them together and they will fight to stay together.

When your drugs wear off, you may feel foolish about some of your questions.

Until I read Mtl zack’s other answer, I thought it meant that Mtl zack was being silly, but now I know it is a movie or something. Nice answer Riser.