In Islam, Allah-azwj does not Forbid marriage between First-Cousins. Allah-azwj Describes, in detail, the forbidding of the marriage among the relatives who are unsuitable for marriage in Sura An-Nisa (4:22–24) and in Sura Al-Ahzab (33:50) Allah-azwj specifically Declares the permissibility of the marriage between the first-cousins.