People come to the house of his deceased grandfather and seek blessing from its water. What should he do?
Question

                My friend’s grandfather was well known for his ability to expel the jinn, but he believes – and Allaah knows best – that he did not interact with them according to Islamic sharee’ah, because according to what my friend says, his grandfather did not pray. Now, after the death of his grandfather, people come to the place where this grandfather lived, seeking blessing thereby. Beside this house there is a tap to which the people come to take water from it, believing it to be blessed, and they leave money beside this tap.

 My question is: what advice can you offer my friend? Should he break this tap or what? Is the money that is left beside this tap haraam?.
Praise be to Allah.
    Firstly: 

    It is not permissible to seek blessing from the relics of 
    anyone except the Prophets, whether those from whom blessing is sought are 
    righteous or evildoers. We ask Allaah to keep us safe and sound. But the 
    fact that people are seeking blessing from one who did not pray is 
    indicative of profound ignorance and heedlessness, and shows how great is 
    the people’s need to learn sound ‘aqeedah that will save them from 
    misguidance. 

    The evidence that it is not permissible to seek blessing from 
    the relics of anyone other than the Prophets is the fact that there is no 
    report that any of the companions of the Prophet  (peace and blessings 
    of Allaah be upon him) sought blessings from Abu Bakr, ‘Umar or anyone else 
    among the Sahaabah (may Allaah be pleased with them). If that had been 
    something good, they would have done it before us. 

    Al-Shaatibi (may Allaah have mercy on him) said: After the 
    death of the Prophet  (peace and blessings of Allaah be upon him), none 
    of the Sahaabah (may Allaah be pleased with them) did anything of that 
    nature with regard to those who succeeded him as leaders. The Prophet  
    (peace and blessings of Allaah be upon him) did not leave behind in the 
    ummah anyone who was better than Abu Bakr al-Siddeeq (may Allaah be pleased 
    with him), who was his successor, and he did not do anything of that sort, 
    and neither did ‘Umar (may Allaah be pleased with him), and they were the 
    best of the ummah after him. Neither did ‘Uthmaan, or ‘Ali, or any of the 
    Sahaabah, and there is no one in the ummah who is better than them. There is 
    no report from any of them via any sound isnaad that they sought blessings 
    in any of these ways or similar ways. Rather they limited themselves to 
    emulating the actions, words and conduct of the Prophet  (peace and 
    blessings of Allaah be upon him). So there is consensus among them that all 
    such things should be avoided. End quote from al-I’tisaam, 1/482 

    Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) said: 
    There is no one from whose relics blessing may be sought except Muhammad 
     (peace and blessings of Allaah be upon him). No blessing should be 
    sought from the relics of anyone else. Blessings may be sought from the 
    relics of the Prophet  (peace and blessings of Allaah be upon him) 
    during his lifetime and after his death, so long as those relics remain. For 
    example, Umm Salamah (may Allaah be pleased with her) had a vessel of silver 
    in which were a few hairs of the Prophet  (peace and blessings of Allaah 
    be upon him) by means of which the sick sought healing. If a sick person 
    came, she would pour some water over these hairs, then stir it, then give it 
    to the sick person. But in the case of anyone other than the Prophet  
    (peace and blessings of Allaah be upon him), it is not permissible for 
    anyone to seek blessing from his saliva, sweat, garment or anything else – 
    rather that is haraam and is a kind of shirk. End quote from Majmoo’ 
    al-Fataawa, 2/107 

    Secondly: 

    Your friend has to do two things: 

    1 – He should warn people against this haraam means of 
    seeking blessing, if he is able to do so. Otherwise, he should seek the help 
    of knowledgeable people to guide the people to the truth and show them the 
    right way, and warn them against corrupt beliefs that will lead them to 
    shirk and bid’ah (innovation). 

    2 – He should get rid of this tap by removing it, cutting off 
    the water supply and so on. He has an example to follow in ‘Umar (may Allaah 
    be pleased with him) who cut down the tree of al-Hudaybiyah when he heard 
    that some people were praying at the tree. 

    Al-Shaatibi (may Allaah have mercy on him) said: Ibn Waddaah 
    said: I heard ‘Eesa ibn Yoonus, the mufti of the people of Tarsoos, saying: 
    ‘Umar ibn al-Khattaab (may Allaah be pleased with him) ordered that the tree 
    beneath which the Prophet  (peace and blessings of Allaah be upon him) 
    had received the oath of allegiance (bay’ah) be cut down, because the people 
    were going and praying beneath it, and he feared that they might fall into 
    fitnah. End quote from al-I’tisaam, 1/448 

    Al-Haafiz ibn Hajar (may Allaah have mercy on him) said: I 
    found with Ibn Sa’d a saheeh isnaad from Naafi’, saying that ‘Umar heard 
    that some people were going to the tree and praying there, so he warned them 
    (not to do that), then he ordered that it be cut down, and it was cut down. 
    End quote from Fath al-Baari, 7/513 

    Thirdly: 
Whatever of this money 
    he has taken, there is no sin on him for that, because it is money that 
    people gave willingly and has no owner, so it is permissible for him to have 
    taken it. But it is not permissible for him to approve of this evil deed in 
    order to take the money, rather he must do what is mentioned above: explain 
    to people and put an end to this evil. 

    It says in Fataawa al-Lajnah al-Daa’imah (23/227), 
    with regard to making use of things that are donated to the awliya’ and the 
    righteous: … but if the things that are donated to the awliya’ and the 
    righteous are things other than sacrifices, such as bread, dates, chickpeas, 
    sweets and other things the permissibility of which as food does not depend 
    on the manner of slaughter, then you should avoid distributing them to the 
    people because that entails propagating innovation and cooperating in 
    spreading it, taking part in the manifestation of shirk and approving of it. 
    But they come under the ruling on property whose owners have forsaken it and 
    left it for whoever wants to take it, so whoever takes any of it, there is 
    no sin on him. 

    End quote. 

    And Allaah knows best.