This hadeeth which is called “the du’aa’ of Jibreel” has no basis in the saheeh Sunnah, and not even among the da’eef (weak) reports. It is a hadeeth that is falsely attributed to the Prophet (peace and blessings of Allaah be upon him). Whoever is familiar with the wording of ahaadeeth and du’aa’s will have no doubt that it is a fabrication of the heretics. Describing the virtues of this du’aa’ it was said: “Whoever writes it on his shroud with the dust of al-Husayn (peace be upon him) will be protected from the torment of the grave”!
Some of the phrases used are indicative of the folly of the author, as he thinks that this du’aa’ can trick the guardians of the faith. Listen to what he says: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said, and I memorized it and taught it to the believers of our party and our supporters”!
As for the exaggerations about the rewards to be earned, and the mistakes in grammar and spelling, there are many such. At the beginning it says: “O Allaah, send blessings upon Muhammad and the family of Muhammad, there is no god but Allaah, the number of those who proclaim His Oneness, Allaah is Most great, the number of those who proclaim His greatness, praise be to Allaah, the number of those who praise Him, glory be to Allaah the number of those who glorify Him, I ask Allaah for forgiveness, I ask Allaah for forgiveness, the number of those who ask for forgiveness.”
Whatever the case, in the saheeh Sunnah there is enough to suffice and we have no need of these misguided myths. Our advice to our brother is to read Husn al-Muslim (available in English under the title “The Fortress of the Muslim”) or Saheeh al-Kalim al-Tayyib, and the du’aa’s narrated by the trustworthy imams such as al-Bukhaari and Muslim in the chapters on du’aa’ in their books.
And Allaah knows best.