Is it permissible for him to buy a computer for his son using interest he has received or keep it in return for waiving debts owed to him?
Question

                I want to get rid of some interest. Is it permissible for me to (i) give it to my son who is a university student aged 22 and he does not have any income except what his father spends on his maintenance for food and drink and the like? Is it permissible for me to give him some of this interest so that he can buy a computer and other things that will help him in his studies?; or (ii) to give it to my siblings who are hard up? Is it permissible for me to keep some of this interest in return for loans that I had lent and that they did not give back to me, and to let them off?.
Praise be to Allah.
    Firstly: 

    It is haraam to deal with riba in all forms and this is a 
    major sin. Allaah says (interpretation of the meaning):

    “O you who believe! Fear Allaah and give up what remains 
    (due to you) from Ribaa (from now onward) if you are (really) believers.

    279. And if you do not do it, then take a notice of war 
    from Allaah and His Messenger but if you repent, you shall have your capital 
    sums. Deal not unjustly (by asking more than your capital sums), and you 
    shall not be dealt with unjustly (by receiving less than your capital sums)”

    [al-Baqarah 2:278-279]

    It is essential to repent from it by giving up the sin, 
    regretting what has happened in the past, resolving not to do it again and 
    giving up the haraam money by spending it on charitable causes and in the 
    public interest. The penitent does not have the right to benefit from it by 
    using it in his own interests, such as buying food or drink or accommodation 
    or spending it on his family or education fees, or on warding off harm or 
    injustice from himself, such as paying the costs of compulsory insurance or 
    any other kinds of taxes and levies. 

    Based on that, you do not have the right to spend from this 
    riba on obligatory maintenance of your son, such as his food and drink or 
    the costs of his education. With regard to buying the equipment that he is 
    unable to buy and which is not included in the obligatory maintenance, it 
    seems that this is permissible, and it is also permissible to pay off his 
    debts, because the father is not obliged to pay off the debts of his son. 

    Secondly: 

    It is permissible to give this interest to a poor brother if 
    his maintenance is not obligatory upon you. See the discussion of that in 
    the answer to question number 
    81952. 

    Thirdly: 

    It is not permissible for you to take this interest in return 
    for waiving debts that are owed to you, because there are benefits for you 
    in that and it is in your interests, because debts may be paid off or the 
    debtor may not be able to pay it. It has been stated above that the penitent 
    is not entitled to benefit from the interest. But you can give it to these 
    debtors, and if they use it to pay off the debts that they owe to you, there 
    is nothing wrong with your accepting it. 

    We ask Allaah to forgive your sins and to accept your 
    repentance. 

    And Allaah knows best.