Is Suurah al-Rahmaan the 'aruus of the Qur'aan?
Everything has an 'aruus and the 'aruus of the Qur'aan is (Suurah) al-Rahmaan
This is a weak hadiith
Let's look at the chain of narrators
Abu Abd al-Rahmaan al-Sulamii -> Ali bin al-Husain bin Jafar al-haafiz -> Ahmad bin al-Hasan dubais al-muQri' -> Muhammad bin Yahyaa al-kisaa'ii al-muqri' -> Hisaam -> Ali bin hamzah al-kisaa'ii -> Muusaa bin Ja'far -> his father Ja'far ->Ali bin al-Husain -> his father -> Ali (may Allaah be pleased with him)
Ahmad bin al-Hasan dubais al-muQri'
al-Dhahabi included him among the weak and abandoned
al-DaaraQutni said: He is not reliable
al-Khatiib said: He is munkar al-hadiith