Eɗomcha Thu Naba Wari, which translates to "the oath of the ancestral spirits," is a binding agreement between the people of Dagbon and their ancestral spirits. The oath is believed to have been made by the founder of the Dagbon Kingdom, Naa Gbewaa, and his people. According to legend, Naa Gbewaa, with the help of his sister, made a pact with the ancestral spirits to protect and defend the kingdom and its people.