a slave woman in islam can become her master's wife in some conditions but what if the master already have 4 wives and the condition for the slave to be wife arrived? will she become 5th wife? if she became wouln't it became against law?

  • There's no such thing like a condition for a slave girl becoming her masters wife except with her to be freed first.
    – Medi1Saif
    Commented Nov 24, 2022 at 6:09
  • This question shows a clear misunderstanding a master must free his slave ifrst before marying her. In other words if he freed her and had 4 wives he can't have a fifth wife. A slave girl however can be a wife another man if her master agrees to such a marriage.
    – Jamila
    Commented Nov 27, 2022 at 1:13

1 Answer 1


No, a slave woman can not become the 5th 'wife' of her master. Your question has several misunderstandings:

  • Concubinage and Marriage are two different things. A concubine is not a wife. A concubine is a slave woman with whom sex is permissible because of ownership alone, without requiring any nikah contract.

    And they who guard their private parts. Except from their wives or those their right hands possess (concubines), for indeed, they will not be blamed.

    Quran 23:5-6

  • There is only a legal limit on the number of wives. There is no limit on the number of concubines. So for example a person can hypothetically have 4 wives and 10 concubines, and it would be legal. See Did scholars define a limitation of concubines a man could have?

  • A marriage contract with a concubine is actually not permissible for her owner. If the master wants to marry his concubine he would first have to free her.

    لا يحتاج وطء السيد لأمته إلى إنشاء عقد زواج، ولو عقد النكاح لنفسه على مملوكته لم يصح النكاح

    A Marriage contract is not required if a master wishes to have sexual relations with his female slave. And if he makes a marriage contract between himself and his female slave it is not valid.

    Encyclopedia of Islamic Jurisprudence 11/297

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