All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
The fact that the soul is returned to the body in the grave and the deceased is made to sit up to be questioned does not refute what we have said here as this is related to life in the Barzakh not in this world. Indeed, the souls remain, but the bodies decay.
As regards calling upon the dead and asking them for help, then this is another matter that is not related to whether their souls remain and move around and so on. Calling upon someone other than Allaah and seeking someone's help is forbidden in Islam, regardless of who that creature is, whether it is a Jinn or a human, a pious person or an evil person, an angel or a Prophet. If the matter was based on the ability to move around or existence, it would have been permissible to call upon the angels and the Jinn, but there are Islamic texts forbidding calling upon anything other than Allaah and clarifying that this is Shirk (associating partners with Allaah). Allaah says (what means): {And [He revealed] that the Masjids are for Allaah, so do not invoke with Allaah anyone.} [Quran 72:18] Allaah also says (what means): {And do not invoke besides Allaah that which neither benefits you nor harms you, for if you did, then indeed you would be of the wrongdoers} [Quran 10:106]
Ibn ‘Abbaas narrated that once he was riding behind the Prophet and the Prophet said to him: “O young man, I shall teach you some words: Be mindful of Allaah and you will find Him in front of you. If you ask, ask of Allaah; if you seek help, seek help of Allaah. Know that if the whole nation were to gather to benefit you with something, they would not benefit you with anything except that which Allaah has destined for you; and if they were to gather to harm you with something, they would not harm you with anything except that which Allaah has destined against you. The pens have been lifted and the sheets have dried”." [At-Tirmithi and Ahmad]
For more benefit, please refer to Fatwa 22722.
In fact, the problem with the Sufis and others is that they have adopted beliefs and followed methodologies without knowledge, and when the people of truth clarified to them that those beliefs were invalid, they began searching for justifications and evidence. They adopted beliefs before they sought evidence of their validity, and this is a great door to misguidance, to the extent that some of them fabricated Ahaadeeth and attributed them falsely to the Prophet allegedly lying in his favor. As-Suyooti, said in his poem Al-Alfiyyah: “Among them are Sufis who fabricated, while they are seeking reward for what they claim.”
The correct course of action is that a Muslim first seeks evidence and then adopts a belief. Shaykh Ibn ‘Uthaymeen said in Ash-Sharh Al-Mumti’: “We have seen the problem of those who profess a belief and then seek evidence on the basis of their belief, so you find them favoring their belief and then they struggle to prove what they want to prove, and they endeavor to falsely refute what they want to refute; this is indeed a problem and no one is safe from it except those whom Allaah wills.” [End of quote]
For benefit about the movement of the souls of the dead, please refer to Fatwa 11722.
Allaah Knows best.