Matthew 19
7 Ref They asked him, "Why then did Moses command us to give her a bill of divorce, and divorce her?"
8 Ref He said to them, "Moses, because of the hardness of your hearts, allowed you to divorce your wives, but from the beginning it has not been so.
9 Ref I tell you that whoever divorces his wife, except for sexual immorality, and marries another, commits adultery; and he who marries her when she is divorced commits adultery."