https://en.wikipedia.org/wiki/Raj_Karega_Khalsa
http://www.sikhiwiki.org/index.php/Guru_Maneo_Granth
The original Dorah which was recited in history is:
Delhi Takht Par Bahegi Aap Guru Ki Fauj,
Chattar Firega Sees Par Badi Karegi Mauj,
Raaj Karega Khalsa Aaakki Rahe Na Koye,
Khuaar Hoye Sab Milainge Bache Sharan Jo Hoye