What is the ruling on marrying a man who committed adultery with another woman? And does the Almighty's saying, "The fornicator does not marry except a fornicatress or a polytheist," mean that she will be considered a fornicatress or a polytheist if she marries him? And how can she be sure of his repentance?

Adultery is a heinous sin, and it is not permissible for a chaste woman to marry an adulterer unless his repentance becomes evident, though there is a difference of opinion among scholars on this matter. His repentance is confirmed by the strong presumption of his seeking forgiveness, regretting his actions, and abstaining from indecency. Thus, repentance from a sin is achieved through seeking forgiveness, feeling remorse, and refraining from that sin. As for a woman who married an adulterer before his repentance, she has committed something forbidden, but she is not considered an adulteress or a polytheist.