5) Whom to marry?
Idolaters are to be shunned in choosing one’s mate.
221 – Do not marry idolatrous women unless they believe; a slave woman is better than an unbelieving woman even though you may like her. And do not give your daughters in marriage to idolaters, unless they believe. A slave who is a believer is better than an idolater even though you may like him. 2 The Cow, 221
A Muslim man or woman is not allowed to marry someone who is in unlawful relations with their mates.
3 – The adulterer will end up marrying an adulteress or an idol worshiper, and the adulterers will end up marrying an adulterer or an idol worshiper. This is prohibited for the believers. 24 The Light, 3
Additionally, the cases in which marriage is forbidden are given below:
22 – And do not marry the women who were previously married to your fathers. What happened in the past is now past. It is shameful and abhorrent, and an abominable act.
23 – Prohibited for you are: your mother, daughters, sisters, father’s sisters, mother’s sisters, brother’s daughters, sister’s daughters; foster mothers, foster sisters; your wives’ mothers, the daughters of the wives you have slept with who are under your charge- but in case you have not slept with them there is no offence- and the wives of your own begotten sons, and marrying two sisters at the same time, what happened in the past is now past. God is Forgiver, Merciful.
24 – Also forbidden are married women. 4 The Women, 22, 23, 24
We have above the persons whom we are not allowed to marry. A Muslim is allowed to marry, for instance, Jews and Christian believers. It is to be noted that in order to come to a decision on a certain issue we have to go over the entire Quran. For example, a person who studies only Sura The Women and has not analyzed Sura The Cow may think that he/she may marry an unbeliever.