If his father asked him for money and he does not have any, does he have to take a loan?
Question

                My father asks us, me and my brothers, for help in sponsoring the marriage of one of my brothers or changing the furniture in the house or other things that are not important. Most of the time I give him my share of what he asks for, but sometimes I am not able to because I do not have the means, then he gets angry with me for a while so I go and ask for a loan from the bank and bring it to him, and so on. Please note that he is financially of moderate means. Is it permissible for me to disobey him and tell him that I do not have the money, or should I go to the bank and take out a loan for something that is not very important?.
Praise be to Allah.
    Firstly: 

    The father has the right to take from his son’s wealth 
    whatever he needs, if that will not harm the son. That is because of the 
    report narrated by Abu Dawood (3530) and Ahmad (6640) from the hadeeth of 
    ‘Abdullah ibn ‘Amr, according to which a man said: O Messenger of Allaah, I 
    have wealth and children, and my father is in need of my wealth. He said: 
    “You and your wealth belong to your father.”

    Classed as saheeh by al-Albaani in Saheeh Abi Dawood. 

    What the hadeeth means – as al-Khattaabi (may Allah have 
    mercy on him) said – is that the father needed the money for his living 
    expenses, but the son’s wealth was so little that his father’s living 
    expenses would consume all that he had. But the Prophet (blessings and peace 
    of Allah be upon him) did not excuse him and allow him not to spend on his 
    father’s living expenses. See ‘Awn al-Ma‘bood. 

    It is stipulated that the father should be in need of this 
    wealth according to the majority of fuqaha’, apart from the Hanbalis, 
    because of the report narrated by al-Haakim (2/284) and al-Bayhaqi (7/480) 
    from ‘Aa’ishah (may Allah be pleased with her) who said: The Messenger of 
    Allah (blessings and peace of Allah be upon him) said: “Your children are a 
    gift from Allah to you – ‘He bestows female (offspring) upon whom He 
    wills, and bestows male (offspring) upon whom He wills’ [ash-Shoora 42:49]
    – so they and their wealth belong to you, if you need it.”

    Classed as saheeh by al-Albaani in as-Silsilah as-Saheehah, 
    2564 

    Ibn Qudaamah (may Allah have mercy on him) said: The father 
    may take whatever he wants from his son’s wealth and take possession of it, 
    whether the father needs what he takes or not, and whether the son is a 
    child or an adult, subject to two conditions:

    (i)that it is not unfair to the 
    son, it does not harm him and he should not take anything that the son 
    needs;

    (ii)that he does not take from the 
    wealth of one son and give it to another, because it is forbidden to single 
    out one child for giving from his own wealth, so it is more appropriate that 
    it should be forbidden to single out one child for giving what he has taken 
    from the wealth of another child.

    Abu Haneefah, Maalik and ash-Shaafa‘i said: He does not have 
    the right to take from his son’s wealth except as much as he needs, because 
    the Prophet (blessings and peace of Allah be upon him) said: “Your blood and 
    your wealth are sacred to you, as sacred as this day of yours, in this month 
    of yours.” (Agreed upon). And it was narrated that the Prophet (blessings 
    and peace of Allah be upon him) said: “It is not permissible to take the 
    wealth of a Muslim unless he gives it willingly.” Narrated by ad-Daaraqutni. 
    And because the son has complete authority over his own wealth, so it is not 
    permissible to take it from him.

    End quote from al-Mughni, 5/395 

    If the father needs the wealth, he may take from his son’s 
    wealth and spend it on his own living expenses and those of his dependents, 
    so long as that does not harm his son and he does not take anything that his 
    son needs, such as his car that he drives, and so on. See also the answer to 
    question no. 9594 

    Secondly: 

    If you do not have any money, you do not have to take out a 
    loan, and you can tell your father: I do not have any money right now, or 
    you can tell him that you need the money that you do have. This is not 
    regarded as being disobedience towards him. 

    It is not permissible to take a loan from a riba-based bank 
    under any circumstances, because of the texts which indicate that the one 
    who consumes riba and the one who pays it are cursed. And it is not 
    permissible to obey your father if he tells you to take out this loan, 
    because there is no obedience to any created being if it involves 
    disobedience towards the Creator. 

    To sum up: if the father needs the money to spend on 
    maintenance or to buy furniture for the house and so on, it is permissible 
    for him to take from his sons’ wealth, on condition that this does not harm 
    them, and that he does not take things that they need. If they do not have 
    any money to spare, then they do not have to take out a loan. 

    The brothers should cooperate to help the one who has not got 
    married, each according to what he is able to afford. 

    And Allah knows best.