Mundhum (also known as Peylan) is the ancient religious scripture and folk literature of the Limbu. It is the ancient, indigenous religion of Nepal. Mundhum means "the power of great strength". The Mundhum covers many aspects of the Kirant culture, customs and traditions that have been taken before Vedic civilisation in South Asia.
Mundhum is organised into two parts — Thungsap and Peysap. The Mundhum extends beyond religion, serving as a guide for culture, ritual and social values. Mundhum is written in ancient Limbu language and versions vary among the various Kirat tribes, serving as each tribe's distinctive culture and framing their social identity and unity in relation to other tribes and peoples.
The Thungsap Mundhum was collected, preserved and passed on by word of mouth and folklore until the art of writing was introduced. It was an epic composed and recited in the form of songs by Sambas, religious poets and bards. The Kirat priests in the beginning were called the Sambas where Sam means song and Ba means the one (male) who knows the Sam.
The Peysap Mundhum is a written book about religion. It is divided into four parts — the Soksok Mundhum, Yehang Mundhum, Samjik Mundhum and Sap Mundhum. The Soksok Mundhum contains the stories of creation of the universe, the beginning of mankind, the cause and effect of the sins, the creation of evil spirits, such as the evil spirits of envy, jealousy and anger and the cause and effect of death in childhood.
The Yehang Mundhum contains the story of the first leader of mankind who made laws for the sake of improvement of human beings from the stage of animal life to the enlightened life and ways to control them by giving philosophy on spiritualism. In this book, the leader has made rules for marriage, arbitration, purification and religion. The story of destruction of human beings by a deluge and the cause of existence of many languages among the Kirat people, the social customs of seasonal worship to the worship of God, the rules of purification on child birth and death are mentioned in the Lepmuhang Mundhum.
Mundhum is a spiritual, rhythmic and shamanic form of scripture. Mundhum rituals and teachings are only used and performed by a very special Kirat religious master or shamanic guru of Kirant. Mundhum is written in very ancient native Kirat language and tones. To study Mundhum, person must study a native Kirat language such as Limbu, Yakha, Sunuwar and Rai. Mundhum almost cover everything like the origin of earth, air, water, fire and life, medicine, god, all ritual birth, marriage, death.
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