The People of Tansang Kenyalang:
Another group that arrived in Kalimantan during the period was the Raja Durong’s group. They too were thought to have escaped persecution in the hand of Muslim rulers at the end of Majapahit era. They migrated from Sumatra, bringing along with them the Hindu tradition practiced during the Majapahit era, like religion and method of worshiping, agricultural knowledge and methodology, shamanism, the conduct of war, established social order, council of elders for major decision making body, all of which were later adopted and followed by the Iban people of Borneo. These traditions are still being practiced in the Iban Gawai Burong and some other rituals today.
Raja Durong married to Endu Cherembang Chermin Bintang and begot a son named Raja Jembu. Raja Jembu was married to Endu Endat Baku Kansat and begot seven children. Sengalang Burong was the eldest son of Raja Jembu and Endu Endat Baku Kansat.
This group settled at a place called Nanga Nuyan, which was soon became the centre and melting pot of all major Dayak Iban group, including the orang Panggau Libau, Gelong and the Bejie groups. Social, political and economic interaction occurred and their population multiplied quickly. With large population, conflicts and divisions began to appear in an egalitarian society which led to splits, power struggle, enmity, war and further migrations. One such enmity was between Sengalang Burong, the hereditary chief of Raja Durong’s group, and a legendary demon named Nising or Beduru. It ended in a war where the “demon” Nising was slain and his people defeated. This saga-epic (ensera) is always mentioned and narrated in the chants by the bards during the grand Gawai Burong festival.
After the war, Sengalang Burong then moved to Bukit Tutop where he died of old age. He left behind a legacy of a system of augury, bird festival procedure and instituting the incest law to the Iban people, through his grandson, Sera Gunting. From Tutop Hill his followers migrated to a place called Tansang Kenyalang, a heavenly place located at the dome of the sky. He was regarded as the God of War and is still worshiped by the traditional Ibans to this day.
Detail articles on Sengalang Burong have been written in two books called Raja Durong and Gawai Burong by Benedict Sandin.