It is narrated from Imam Mahdi (AJ) who said: Pray a lot for my appearance because your relief is also in that . It is narrated from Imam Sadeq (AS) who said: Whoever recites Salawat to the Prophet (PBUH) and his family, and asks from God to hasten the appearance of Imam Mahdi (AJ), after Dawn and noon Salaats, will not die until he/she recognizes Imam Mahdi (AJ) . Imam Hassan Askari (AS) pointing to problems during occultation, in this regard said: In this condition, no one will be saved from destruction unless God grant him/her the opportunity to pray to Allah (SWT) to hasten the appearance of Imam Mahdi (AJ) .
In another narration, Imam Mahdi (AJ) said: If any believer after mourning for Imam Hussain (AS) prays for me, I will also pray for that person . It is also narrated from Imam Hassan Askari (AS) who said: If any morning you see an Imam from the family of the Prophet Mohammad (PBUH) is hidden and you cannot see him, then pray to Allah (SWT) for his appearance. Then soon relief and opening will come to you .
 Kamalu Deen,Vol. 2, Page 485, Imam’s letter to his second special representative, Is’haq ibn Yaqoob.
 Mesbahul Mojtahid, Sheikh Toosi, Page 328.
 Beharul Anwaar, Vol. 102, Page 112.
 Mekyalul Makarem, Vol. 1, Page 333.
 Kamalu Deen,Baab 32, Hadith 8.