The scholars of the Standing Committee were asked: A man committed zina with a virgin and wants to marry her. Is it permissible for him to do that?

They replied: If the matter is as described, each of them must repent to Allaah and give up this sin, and regret what has happened of immoral actions, and resolve not to do it again, and do a lot of good deeds, in the hope that Allaah will accept their repentance and turn their bad deeds into good.

Allaah says (interpretation of the meaning): “And those who invoke not any other ilaah (god) along with Allaah, nor kill such person as Allaah has forbidden, except for just cause, nor commit illegal sexual intercourse ___ and whoever does this shall receive the punishment.

69. The torment will be doubled to him on the Day of Resurrection, and he will abide therein in disgrace;

70. Except those who repent and believe (in Islamic Monotheism), and do righteous deeds; for those, Allaah will change their sins into good deeds, and Allaah is Oft‑Forgiving, Most Merciful

71. And whosoever repents and does righteous good deeds; then verily, he repents towards Allaah with true repentance” [al-Furqaan 25:68-70]

If he wants to marry her, then he must wait for one menstrual cycle to establish whether her womb is empty before doing the marriage contract with her. If it turns out that she is pregnant, then it is not permissible for him to do the marriage contract with her until after she gives birth, in accordance with the hadeeth in which the Prophet (peace and blessings of Allaah be upon him) forbade a man to water the crop of another with his own water.

Fataawa Islamiyyah (3/247).