Here's are the references you are looking for:

A word of caution: You must read and understand scripture in context of the other passages. It does no good to throw out individual verses if you have not first read and sought to understand how they fit into the context. It is a misuse of scripture to do that.

All ESV

Mat 19:

9And I say to you: whoever divorces his wife, except for sexual immorality, and marries another, commits adultery."

Mat 5:

32But I say to you that everyone who divorces his wife, except on the ground of sexual immorality, makes her commit adultery, and whoever marries a divorced woman commits adultery.

Mark10:

10And in the house the disciples asked him again about this matter. 11And he said to them, "Whoever divorces his wife and marries another commits adultery against her, 12and if she divorces her husband and marries another, she commits adultery."

Luke 16:

18"Everyone who divorces his wife and marries another commits adultery, and he who marries a woman divorced from her husband commits adultery."

http://www.biblegateway.com

N.