The voice from sky
{{Shia Islam}}
{{Eschatology}}
The voice from sky ({{Langx|ar|صوت من السماء}}), according to Shia Islamic eschatology, will be words spoken by Jibrael which is one of the signs of Mahdi's appearance.
Purview
The voice from sky by Gabriel is amongst five certain signs for appearance of Mahdi. The voice will be heard by everyone of their own language. Sky is introduced as the sound source in many narrations. The voice can be heard from near and far alike and will awaken sleeping people. It is mercy for the believers and for disbelievers is the torment, then Mahdi will become renowned.{{cite book | first1=Muhammad Baqir | last1=Majlesi | url=http://www.noorlib.ir/View/fa/Book/BookView/Image/2491 | title=Bihar al-Anwar | series=بحار الأنوار | year=1368 | publisher=Dar al-Ihya al-Torath al-Arabi | volume=51 | location=Beirut | page=152}}{{cite book|last1=No'mani|first1=Muhammad|title=al-Gheyba|series=الغيبة |year=1397 |publisher=Maktaba al-Saduq|location=Tehran|page=181|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/11355|accessdate=2015-09-19}}{{cite book|last1=Kurani|author-link=Ali Al-Kourani|first1=Ali|title=al-Mu'jam al-Mozu'i le al-Ahadith al-Imam al-Mahdi (ajtf)|publisher=Dar al-Murtaza|location=Beirut|pages=477–484|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/18454|accessdate=2015-09-19}}
Time
Though the voice from sky is claimed as a confirmed sign but there is a discrepancy in the event time. According to a narration from Muhammad al-Baqir this voice will be heard in Ramadan before reappearance of Muhammad al-Mahdi. In compliance with Al-Shaykh Al-Mufid, as well as others, there is a Hadith which state a synchronicity between reappearance of Muhammad al-Mahdi and the voice from sky. Based on another narration it will happen on Thursday night, twenty-third day of Ramadan.{{cite book|last1=No'mani|first1=Muhammad|title=al-Gheyba|series=الغيبة |year=1397 |publisher=Maktaba al-Saduq|location=Tehran|pages=254 & 263|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/11355|accessdate=2015-09-19}}{{cite book | first1=Muhammad Baqir | last1=Majlesi | url=http://www.noorlib.ir/View/fa/Book/BookView/Image/2492 | title=Bihar al-Anwar | series=بحار الأنوار | year=1368 | publisher=Dar al-Ihya al-Torath al-Arabi | volume=52 | location=Beirut | page=204}}{{cite book|last1=Al-Shaykh Al-Mufid|author-link=Al-Shaykh Al-Mufid|first1=Muhammad |title=al-Ikhtisas|publisher= al-Mu’tamar al-Alemi|location=Qum|volume= |page=208|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/11247}}
Content
As claimed by most narration, contents of the voice will be about Muhammad al-Mahdi and his characteristics; and it will invite people towards him. Also, Shiite victory will be mentioned.{{cite book|last1=Rizvi|first1=Baqir Sharif al-Qarashi; translated by Sayyid Athar Husain S.H.|title=The life of Imam al-Mahdi : peace be upon him|date=2007|publisher=Ansariyan Publications|location=Qum|isbn=978-964-438-806-4|page=321|url=http://www.coiradio.com/library/library/pro_ahl/imam12_mahdi/the_life_of_imam_mahdi/27.htm}}{{cite book|last1=Ibn Babawayh|author-link=Ibn Babawayh|first1=Muhammad|title=Kamal al-Din & Tamam al-Ne'ma|series=كمال الدين و تمام النعمة |date=1980|publisher=Dar al-Kotob al-Islamia|location=Tehran| volume=2 |page=372|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/2662}}{{cite book | first1=Muhammad ibn Ya'qub | last1=Kulayni | author-link=Muhammad ibn Ya'qub al-Kulayni | url=http://www.noorlib.ir/View/fa/Book/BookView/Image/2328 | title=Kitab al-Kafi | series=الکافي | year=1363 | publisher=Dar al-Kotob al-Islamia | volume=8 | location=Tehran | page=310}}
Voice of Satan
It has been narrated about the voice of Satan at the end of the day of heavenly voice, which its aim is making doubts to follow Muhammad al-Mahdi.{{cite book|last1=No'mani|first1=Muhammad|title=al-Gheyba|series=الغيبة |year=1397 |publisher=Maktaba al-Saduq|location=Tehran|page=265|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/11355|accessdate=2015-09-19}}{{cite book|last1=Ameli |first1= Ja’far Murtaza |title=Derasa fi Alamat al-Zohur|publisher=al-Markaz al-Islami le al-Derasat|location=Beirut|page=18|url=http://www.noorlib.ir/View/fa/Book/BookView/Image/16104|accessdate=2015-09-19}}