A Balanced Approach to Marriage Between Relatives and Hereditary Diseases

In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Imam Abdul Aziz Bin Baz, may Allah have mercy upon him, was asked:

يا سماحة الشيخ

We have heard that indeed there is danger in marrying relatives as I want to marry off one of my children. Is there any hadith regarding this? May Allah reward you.

Answer: There is no danger therein. What is said (regarding this) is an error. There is no danger in marrying relatives, rather, it is good. The Prophet, peace and blessings of Allah be upon him, married from his relatives. Umm Salamah was from his relatives, Aisha was from his relatives, and Umm Habiba was from his relatives. All of them are from Quraysh, all from his tribe. There is no harm in that. Ali married Fatimah, the daughter of the Prophet, peace and blessings of Allah be upon him, who was the daughter of his cousin (i.e. The Prophet, peace and blessings be upon him). Uthman married the Prophet’s daughters, Ruqayyah and Umm Kulthum (i.e. after of them died he married the other). Abu Al Aas Ibn Ar-Rabee married the Prophet’s fourth daughter, Zainab, and all of them were cousins. There is no harm in this. [1]

The Imam, may Allah have mercy upon him, was also asked: Some people would not marry the daughter of their uncle out of fear that the children might be born with deformities. Does this negate the perfection (completeness) of (one’s) belief in pure Islamic monotheism?

Answer: Many among the people of knowledge have clarified these matters , and that indeed a person should choose a suitable spouse for their offspring to the extent that some of the Fuqaha said: “The best is that one marries a non-relative, rather than the daughter of his uncle”. This is a mistake and it has no basis, whether it is the daughter of his paternal uncle or not the daughter of his paternal uncle, the daughter of his maternal uncle or not the daughter of his maternal uncle. The Prophet, peace and blessings be upon him, married the daughter of his uncle.

But, one should examine (give thought or consideration) that if the woman comes from a family that is afflicted with hereditary defects, mental illness, or physical deformities, he should not marry (someone among) them from the angle of employing the means of precaution, because this could bring you hereditary (issues). Diseases can be passed down – by the will of Allah- to the child, the grandchild and the daughter’s child. If this (such and such) family is well-known to have hereditary diseases that affect the children, he should avoid (marrying into such family). And if nothing is known about the family (i.e. regarding hereditary diseases), he marries (someone) among them. These matters that are known – (through experience, observation etc) regarding what is passed down do occur. Due to this, scholars and physicians advise that one examines (pays attention) to these matters. [2]

[1]Paraphrased:https://binbaz.org.sa/fatwas/8826/%D8%AD%D9%83%D9%85-%D8%A7%D9%84%D8%B2%D9%88%D8%A7%D8%AC-%D9%85%D9%86-%D8%A7%D9%84%D8%A7%D9%82%D8%A7%D8%B1%D8%A8

[2]Paraphrased:https://binbaz.org.sa/fatwas/2565/%D8%AD%D9%83%D9%85-%D8%AA%D8%B1%D9%83-%D8%A7%D9%84%D8%B2%D9%88%D8%A7%D8%AC-%D9%85%D9%86-%D8%A7%D9%84%D8%A7%D9%82%D8%A7%D8%B1%D8%A8-%D8%AE%D8%B4%D9%8A%D8%A9-%D8%A7%D9%84%D8%A7%D9%85%D8%B1%D8%A7%D8%B6