What is the authenticity of the mentioned hadiths that speak of the Companions' visions of unseen matters, such as Ibn Umar seeing Abu Jahl being tormented in his grave, and a man seeing the Throne of the Most Merciful and the angels of provision, and what is the extent of the authenticity of the book "Fada'il al-A'mal" (Virtues of Deeds)?

Summary of the Answer:

1. The story of Abdullah ibn Umar's vision of Abu Jahl's torment in Badr is very weak due to its weak chain of transmission. There are also mursal narrations about it whose authenticity is not established.

2. The hadith of Al-Harith ibn Malik Al-Ash'ari, "How did you awaken, O Harithah?" has been narrated in two forms: mursal and muttasil. The mursal forms are mu'dal, and the muttasil forms are weak due to the weakness or unknown status of some narrators. Scholars have deemed this hadith weak, and none has authenticated it. Even if its authenticity were accepted, it does not imply physical vision but rather such strength of faith that it is as if one sees the unseen.

3. The book "Fadha'il al-A'mal" (Tablighi Nisab) is filled with superstitions, innovations, and weak or fabricated hadiths. It is a book of evil and misguidance, and it is not permissible to transmit it or believe its contents.

4. The claim of humans knowing the unseen is disbelief, for Allah, the Almighty, alone is the Knower of the Unseen, and He does not disclose His Unseen to anyone except to a messenger whom He has chosen.