Mark 10:8-12

And they twain shall be one flesh: so then they are no more twain, but one flesh.

What therefore God hath joined together, let not man put asunder.

And in the house his disciples asked him again of the same matter.

And he saith unto them, Whosoever shall put away his wife, and marry another, committeth adultery against her.

And if a woman shall put away her husband, and be married to another, she committeth adultery.