The holy Qur'an is the first source. Obey Allah, and obey the Messenger, and those charged with authority among you. That is best, and most suitable for final determination. The adulterer shall not marry save an adulteress or an idolatress, and the adulteress none shall marry save an adulterer or an idolater. All that is forbidden unto believers.
Good women are for good men, and good men for good women . . .
Good women are for good men and good men are for good women . Allah knows best. Why equality is insisted upon The Prophet Muhammad, p.b.u.h. appears to have viewed with disapprobation mismatched marriages. He is said to have declared that women should not be contracted in marriage except to their equals. If afterwards it appears that he is a habitual drunkard, and the girl, upon attaining puberty, declares that she is not content with the marriage under these circumstances, and if the father was not aware of his being a drunkard, then the marriage is liable to be cancelled.