Matthew 19:9

9 I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.”

Read Matthew 19:9 Using Other Translations

And I say unto you, Whosoever shall put away his wife, except it be for fornication, and shall marry another, committeth adultery: and whoso marrieth her which is put away doth commit adultery.
And I say to you: whoever divorces his wife, except for sexual immorality, and marries another, commits adultery."
And I tell you this, whoever divorces his wife and marries someone else commits adultery—unless his wife has been unfaithful. ”