Qobu Jjumu is the ancestral patriarch who stands at the hinge of the mythic and human ages in the Nuosu Book of Origins. In the genealogy chanted by the bimo he fathers three sons, and it is his youngest, Jjumu Vuvu, who, warned of the coming deluge, seals himself in a wooden chest and survives while his brothers, trusting vessels of iron and bronze, perish. Through this surviving son and the son's celestial marriage the human clans descend, so that Qobu Jjumu is remembered as the father of the flood generation from whom the reckoning of Nuosu ancestry proceeds.