Kapłańska 21:13 Halacha: Mishneh Torah, Virgin Maiden, Mishneh Torah, Marriage, Mishneh Torah, Positive Mitzvot & Sefer HaChinukh

A High Priest who raped or seduced a virgin maiden, is not allowed to marry her because he is commanded to marry a virgin maiden and when the time comes to marry her she is no longer a virgin maiden. If they did marry, he must give her a get.

There are some intercourse prohibitions [that are inferred] from a positive commandment and are not among the negative prohibitions. There are three of them: a first or second generation male or female Egyptian or Edomite, and a non-virgin to a high priest. Since it is not written regarding these that “one may not come” or “one may not take”, but rather [concerning an Egyptian or Edomite] “they may join the congregation of God in the third generation” (Deuteronomy 23:9), you may infer that first and second generation [Egyptians and Edomites] are forbidden to join [the congregation of God]; and since it is stated [concerning a high priest] “he must marry a virgin” (Leviticus 21:13) you may infer that [a high priest] may not marry a non-virgin. And a negative prohibition that is inferred from a positive commandment has the status of a positive commandment.

That the High Priest shall marry a virgin, as it is said, “And he shall take a wife in her virginity” (Lev. 21:13).