What does Islam say about marrying your 1st cousins for several generations? Is it encouraged or discouraged?

Edit: There is a practice in some Asian countries that families tend to marry within themselves for many generations such that upto 3-4 generations have couples who were first cousins.

Science today tells us that marriages within the family over many generations contracts the gene pool and may lead to diseases and deformities.

I'm aware that Islam allows marriages between cousins. But does it allow encourage or discourage their children, grand children, great grand children and so on to again marry just their cousins?

  • There's a mismatch between the question title and content consider editing it and adding all necessary information. – Medi1Saif Dec 28 '18 at 7:59

I disagree with the post by hussain kazmi. Just because it is not prohibited, does not mean it is encouraged; it's simply permissible. I believe the Prophet did marry his cousin (Zaynab) but this does not mean we copy the same, because he married her for specific reasons.

Therefore, I do not believe there are any Islamic teachings that explicitly say that marrying your cousin is rewardable or encouraged. It is merely permissible; however, there are recent studies that show that consanguineous marriages are more likely to result in disabilities, so it would be unwise to do so while aware of that fact.

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Of Course, Islam encouraged cousin marriage (or Islam preferred marriage within the family rather than out of the family). As Allah mentioned in Al-Nisaa 4:23:

Prohibited to you (for marriage) are: your mothers, daughters, sisters; father's sisters, mother's sisters; brother's daughters, sister's daughters; foster-mothers (who breastfed you), foster-sisters (who breastfed from the same woman as you); your wives' mothers; your step-daughters under your guardianship, born of your wives with whom you have consummated marriage, no prohibition if ye have not consummated; (those who have been) wives of your sons proceeding from your loins; and two sisters in wedlock at one and the same time, except for what is past; for Allah is Oft-Forgiving, Most Merciful.

It is very clear from above verses that Allah gave permission for Cousin Marriage.

Now regarding your main question, Prophet Muhammad encouraged cousin marriage.

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  • You didn't give any evidence for your word "encouraged." You only showed it is allowed, not encouraged. – The Z Jan 22 at 15:17

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