Can the mother give a large part of her wealth to one of her daughters who is going to get married?
Question

                Our father left us a house and we sold it, and each of us took her share of the inheritance; we are six sisters and our mother. My mother wanted to give me a large part of her inheritance so that I could get married, because my father helped my sisters. She also wants to give my second sister something because she is not married. Is this haraam? Is my mother committing any sin? Please reply.
Praise be to Allah.
    The parents have to treat their children fairly when giving 
    gifts, because of the report narrated by al-Bukhaari (2586) and Muslim 
    (1623) from al-Nu’maan ibn Basheer (may Allaah be pleased with him) who said 
    that his father brought him to the Messenger of Allaah (blessings and peace 
    of Allaah be upon him) and said: I have given this son of mine a slave that 
    belonged to me. The Messenger of Allaah (blessings and peace of Allaah be 
    upon him) said: “Have you given a similar gift to all your children?” He 
    said: No. The Messenger of Allaah (blessings and peace of Allaah be upon 
    him) said: “Then take it back.” 

    According to a report narrated by al-Bukhaari (2587) [the 
    Prophet (blessings and peace of Allaah be upon him) said: “Fear Allaah and 
    treat your children fairly.” He said: So he went back and took back his 
    gift. According to a report narrated by Muslim (1623): The Messenger of 
    Allaah blessings and peace of Allaah be upon him said: “O Basheer, do you 
    have any other children?” He said: Yes. He said: “Have you given to all of 
    them like you have given to this one?” He said: No. He said: “Then do not 
    ask me to bear witness for I will not bear witness to injustice.” 

    There is no differentiation between the mother and the father 
    in that regard. See the answer to question number
    67652. So it is haraam for her 
    to differentiate between her sons and daughters, except with the consent of 
    all. 

    It is important to know the difference between maintenance 
    and gifts. Maintenance is according to need. For the one who needs to get 
    married for example, the father should spend on his marriage, but he does 
    not have to leave behind money for those who are not married; rather it is 
    not permissible for him to do that, because this will come under the heading 
    of gifts and not under the heading of maintenance that the son needs. 

    Based on that, if you are going to get married and you need 
    some money, then your mother may give you what you need, and she is not 
    obliged to give to the rest of your siblings the same as she gave to you, 
    and she does not have to ask their permission. 

    With regard to your other sister, your mother should not give 
    her something until she is going to get married and needs the money, at 
    which time she may give her what she needs and no more than that. 
See also the 
    answer to question number 119655. 

    And Allaah knows best.