Hamzaad (Qareen ) is the demon permanently assigned to each person during his/her life whose job is to seduce human beings. Allah Almighty says: “His Companion will say: “Our Lord! I did not make him transgress, but he was (himself) far astray.” (Qaf: 27) i.e. the devil assigned to seduce him will say: “My lord! It was not me who seduced him at the beginning, but it was he himself who preferred blindness to guidance. So, I helped him achieve his goal through seduction.”
36. If anyone withdraws himself from remembrance of ((Allah)) Most Gracious, We appoint for him an evil one, to be an intimate companion to him. Sura Az-Zukhruf (36)
In a hadith, the Prophet Muhammad (Peace Be Upon Him) tells us that a demon is assigned to every human being: “There is no one among you but a comrade from among the jinn is assigned to him.” Sahaba e Karam (RA) present in that occasion asked: “Even you, O Messenger of Allah?” He said: “Even me, but Allah granted me victory over him and he became Muslim (or: and I am safe from him), so he only enjoins me to do that which is good.”
In order to get rid of such demon comrade, one should continuously recite the Quran, particularly the verse of Al-Kursi (verse number 255 of Surat Al-Baqarah), and the last two verses of the same Surah.
So Qareen or Hamzaad is a devil appointed as a companion. The Qareen should not be asked to be brought out or revealed, they are dangerous. However, some Amileens take the risk and do various things to communicate with him and gain benefits. Since Hamzaad remains with an individual, he knows about all the history of the person. Amils after taking control over their own Hamzaad, contact with the Hamzaad of any person and gain information about their past. By this way they inform their clients about their past and impress them with their knowledge but Hamzaad don’t have information about the future so any information on future given by Amileen is not reliable.
Enslaving the Jinns or Hamzaad is possible but a risky business and can cost one his life. It shouldn’t be done without having proper guidance from an experienced person. Once an amil was doing exercise for controlling his Hamzaad. He lit a candle and placed it on his back in a dark room during night. He focused on his shadow which appeared on the front wall and started reciting a verse. He continued for few nights after which his shadow started moving. After some more time, the shadow started running around the room although the candle and he himself was stationary. On the last day of his exercise, he was busy in his work without knowing that some guests were sleeping on the roof top of his neighbor’s house. All of sudden the Charpoys (beds) started falling from the roof. The guests got panicked and a crowd gathered around. People knocked the amil’s door as well and he had to break his work to go out to see whats happening. His Chila broke and the Hamzaad got free. Later the amil started receiving stains of blood on him and suffered throughout his life.
Hamzaad gets powerful when its companion human being indulges in evils and gets weaker if the person does good deeds. When one goes astray from the right path, he/she gets strong inclination/temptation from the inside. He/she feels that someone inside is pushing towards something. Scientist can claim it to be split personality or anything else. But the truth is Man is born with both Evil and Good in his inside. He has choice. If he chooses evil, than his evil takes over his goodness and he becomes a devil