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.