The Keys of Solomon, sometimes known as the Goetia, or the 72 Spirits of Solomon, is an extensive list of 72 Demon spirits, that according to legend, were 72 rebellious Kings that King Solomon had shut up in a brass vessel and threw it into a deep lake. Later Babylonians seeking treasure found the vesseel and opened it, thereby causing the release of the demon spirits inside. It is said the Babylonins then began worship of Belial whom they beleived was the most powerful.
Lemegeton, the text that contians the so called Keys of Solmon, which is falsely attributed to Solomon himself contains all 72 spirits and thier sigils, as well as extesntive instrcution on how to summon each one, as each of the 72 spirits is assigned with specific funtions.