Bhai Nihangia Singh, a Labana by Caste, was the Son of Lakhi Shah. He along with his his father, brother and another person named Naik, son of Kahna, brought the headless body of Guru Tegh Bahadur, after he was executed at Delhi's Chandni Chowk under imperial orders, to his home at Raislna (Delhi). The famous Gurudwara Rakab Ganj Sahib was later erected where the Guru's body was cremated. The family used their burning home to cover the secret cremation of the Guru's body as Aurangzeb is said to have given orders that the body and head of the Guru be put on public display. It is said that a violent storm allowed the men to carry away the Guru's body whose severed head was already being returned to his young son, his sucessor as Guru, at Anandpur.
In the Conquest of Sadhora, Bhai Nihanga Singh joined with Banda Singh Bahadur along with other labana followers. The hindus of that area are reported to have also joined with the khalsa army in the battle as they thought it to be a God sent oppurtunity to liberate themselves from under the thumbs of the Muslim butchers and tyrants who ruled the area.
Bhai Nihangia did a heroic deed there. He also did sewa during Guru Gobind Singh and Baba banda Singh Bahadur times.