24:3The adulterer shall marry none but an adulteress or an idolatress; and the adulteress shall marry none but an adulterer or an idolater. That has been prohibited for the believers.

24:33And let those who do not find the means to marry abstain, until God enriches them from His bounty. If any of your servants wish to be freed, grant them their wish, if you recognize some good in them. And give them of God’s wealth which he has given you. And do not compel your girls to prostitution, seeking the materials of this life, if they desire to remain chaste. Should anyone compel them—after their compulsion, God is Forgiving and Merciful.