Those who are unable to marry should keep chaste until Allah gives them enough out of His bounty. If any of your slaves wish to pay for their freedom, make a contract with them accordingly, if you know they have good in them, and give them some of the wealth Allah has given you. Do not force your slave-girls into prostitution for your own worldly gains, if they wish to preserve their chastity; and if anyone forces them into it, then surely after such a compulsion Allah will be forgiving and merciful to them.
Meaning:-
Chaste: virgin, not having any sexual nature or intention, abstaining from extramarital, or from all, sexual intercourse.