{ And women who are married [are unlawful], except what your right hands have possessed } Al-nisaa 24

Abu Bakr Al-Razi said: This verse is evidence that freeing a slave does not serve as bride price for her, since the verse implies that a vagina is property. It is narrated that He (peace be upon him) freed Safiyah and made her liberation her bride price; but this was one of the attributes of the Messenger (peace be upon him).