Is the supplication of an insane person answered?
Question

                Does the duaa of an insane person count?.
Praise be to Allah.
    There is nothing in the Sunnah to indicate that the 
    supplication of an insane person is answered, so it is not permissible to 
    claim that unless there is evidence to prove it, and there is nothing in the 
    evidence that bears witness to that. Perhaps the origin of this claim comes 
    from exaggeration of the Sufis thought concerning the insane and the 
    simple-minded, or from the way in which the common folk go to extremes in 
    mistreating these insane people. Many people wrong them and mistreat them 
    unlawfully, and others think that they are better than same people or that 
    they have a high status in worship or a special status before Allaah. 

    Rather we go further than that and say that the supplication 
    of an insane person is not based on understanding and knowledge, so it does 
    not fulfil the meaning of supplication which is worship and which implies 
    that the person who is offering the supplication has in mind the meanings of 
    Divinity and Lordship and the might of Allaah, may He be glorified and 
    exalted, and he has in mind his need and submission and humility before 
    Allaah. If an insane person says supplication, he is only uttering words 
    that he does not know the meaning of and does not intend what they imply. 
    Can something like this be called supplication, let alone be claimed that it 
    is accepted and answered by Allaah? 

    But some of these insane people, who are not accountable, may 
    have some understanding of some things and may be able to distinguish 
    between the one who treats him kindly and honours him and the one who 
    mistreats him and scorns him, so he may say some good words and supplication 
    for the one who is kind to him. He may also supplicate against the one who 
    mistreats him and scorns him, and it is not unlikely that his supplication 
    may be answered in that case, especially if he is wronged and is seeking 
    help against the one who wrongs him. 

    But saying in absolute terms that the supplication of the 
    insane person is answered is something for which there is no evidence; 
    rather it is speaking about Allaah without knowledge. 

    And Allaah knows best.