In the age of Satyug, a Sanyasi lived in the area near modern day Hajur Sahib, his name was Brahm-anand. This Sanyasi’s family all had ‘Anand’ at the end of their name and it was from their famous family that the town where Hajur Sahib is was called Nander. Brahm-Anand had nine students (chele) who all asked him one day to bless them with liberation (mukti) from the birth and death cycle. Brahm-anand told them that does not possess this power to give liberation but told them to wait till the age of Kalyug where Paramataa himself will come in a form to give them liberation. Brahm-anand told his students, “When He comes you must go and pay him homage. He himself will recognize you and call you over and ask for the granth”1 . The nine students were puzzled and asked Brahm-anand how they will live until Kalyug. Brahm-anand told them under his blessings they would not feel hunger and they will not die. Brahm-anand then gave his students a scripture (pothi) which was in Sanskrit. Brahm-anand told his disciples that when Paramatmaa’s very form appears to you in Kalyug He will ask for this scripture, so keep it with you. The students obeyed their Guru’s command and proceeded to the jungles where they became hidden and did their worship until the age of Kalyug.
Several ages past before Guru Gobind Singh Ji, Paramatmaa’s very form, traveled south to Nander. The nine disciples of Brahm-anand all became aware of a very special being in their vicinity so they ventured to get a glimpse if Narayana had finally arrived. When they arrived at the Guru’s Court, Guru Ji greeted them and asked them if they have the scripture that he wanted. Guru Ji told them he knew they were waiting for him. The disciples of Brahm-anand were in the highest stage of bliss, how many long years had they waited for this moment? After Guru Gobind Singh Ji received the scripture (pothi) He gave the students of Brahm-anand liberation (mukhti).
The scripture that was given to Guru Gobind Singh Ji was the story of the Sarbloh avatar (manifestation of God). Dusht-Daman (the previous avatar of Guru Gobind Singh Ji) had written what he had seen in Satyug between the war of Sarbloh and various demons (Bheemnaad and his brother Beerjnaad). The scripture (pothi) was in Sanskrit but Guru Gobind Singh Ji rewrote some/many parts of it in various contemporary languages. The various languages of the Sarbloh Granth include Arabic, Persian, Brij Bhasha, Sanskrit, Sadhu Bhasha and various other dialects. Guru Gobind Singh Ji completed and formalized the Sarbloh Granth at present day Gurdrawa Baba Nidhan Singh Ji infront of Takht Hazur Sahib. Previously this Gurdrawa was a Nihang Singh Chauni (encampment) but the property was given to Baba Nidhan Singh to set up a spot dedicated to langar (free community kitchen). The Chauni was previously called Bunga Sarbloh Ji.