She took a riba-based loan and gave it to her brother to do Hajj
Question

                My brother was longing to go for Hajj and he did not have the financial resources for that, so I decided to help him. I have some money in the bank, but I preferred to keep it because I am afraid that I may need it for many important things. So I took a loan from the bank and used it to help my brother. My question is: what is the ruling on the good deed that I wanted to do? Will I have any reward for that, or as taking the loan from the bank is haraam, will I not get any hasanah for this good deed? What about my brother’s Hajj – is it valid so long as he is not responsible for the source of the money?.
Praise be to Allah.Firstly: 
Spending 
    money to help one’s brother or anyone else perform Hajj is a great righteous 
    deed, because it is helping him to perform this important act of worship 
    which will lead to his being raised in status and his bad deeds being 
    erased. But it is not permissible for this help to be a cause of you falling 
    into that which Allaah has forbidden, such as taking a loan from a 
    riba-based bank, for riba is a serious matter, and warnings have been issued 
    concerning it that have not be issued concerning any other sin. 
For more 
    information please see question no.
    6847 and
    9054. 
What you 
    have to do is repent to Allaah from dealing in riba. 
You should 
    note that it is not permissible to deposit money in a riba-based bank except 
    if there is fear for one’s wealth and there is no Islamic bank. In that case 
    you should deposit in a non-interest-bearing account, because one of the 
    basic principles of sharee’ah is that necessity may make that which is 
    forbidden permissible, but only as much as is necessary. 
Secondly: 
Your 
    brother’s Hajj is valid in sha Allaah, because he took the wealth from you 
    in a permissible manner, either as charity, a gift or a good loan (i.e. one 
    without interest). 
Some 
    scholars are of the view that the wealth which a person acquires by haraam 
    means – such as riba – is haraam for the one who acquires it only, and it is 
    not haraam for the one who takes it from him subsequently in a permissible 
    manner, such as selling, gift-giving and so on. We have discussed this in 
    the answer to question no. 45018. 
The 
    prohibition applies only to you having taking a loan with interest, not to 
    your brother. 
May Allaah 
    help us and you to do that which He loves and which pleases Him. 
And Allaah 
    knows best.