Responsibility before marriage

El Baqarah: Chapter 2 Verse 238

And if you divorce them before you have touched them, but have settled for them a dowry, then half of what you have settled shall be due from you, unless they remit, or he, in whose hand is the tie of marriage, should remit. And that you should remit is nearer to righteousness. And do not forget to do good to one another. Surely, Allah sees what you do.