A libation is a ritual pouring of a liquid, or grains such as rice, as an offering to a deity or spirit, or in memory of the dead. It was common in many religions of antiquity and continues to be offered in cultures today. Various substances have been used for libations, most commonly wine or other alcoholic drinks, olive oil, honey, and in India, ghee. The vessels used in the ritual, including the patera, often had a significant form which differentiated them from secular vessels. The libation could be poured onto something of religious significance, such as an altar, or into the earth. In East Asia, pouring an offering of rice into a running stream symbolizes the detachment from karma and bad energy. The Sumerian afterlife was a dark, dreary cavern located deep below the ground. This bleak domain was known as Kur, where the souls were believed to eat nothing but dry dust and family members of the deceased would ritually pour libations into the grave through a clay pipe, thereby allowing the dead to drink. Libation was part of ancient Egyptian society where it was a drink offering to honor and please the various divinities, sacred ancestors, humans present and humans who are alive but not physically present, as well as the environment. It is suggested that libation originated somewhere in the upper Nile Valley and spread out to other regions of Africa and the world. According to Ayi Kwei Armah, “[t]his legend explains the rise of a propitiatory custom found everywhere on the African continent: libation, the pouring of alcohol or other drinks as offerings to ancestors and divinities.” drink offering Libations were part of ancient Judaism and are mentioned in the Bible: And Jacob set up a Pillar in the place where he had spoken with him, a Pillar of Stone; and he poured out a drink offering on it, and poured oil on it. In Isaiah 53:12, Isaiah uses libation as a metaphor when describing the end of the Suffering Servant figure who "poured out his life unto death".