أكْثِرُواالدُّعاءَ بِتَعْجيلِ الْفَرَجِ، فَإنَّ ذلِكَ فَرَجَكُمْ. Pray[Dua] a lot to hasten my Faraj in any suitable situation, that my Faraj will be the solution of your problems.
Bihar al-Anwar, Vol 53, page 181
Hujjat Allah ibn al-Hasan Imam al-Mahdi (Ajal allahu ta'ala farajaho shareef)Hadith