Geb was the Egyptian god of the earth and a mythological member of the Ennead of Heliopolis. He could also be considered a father of snakes. It was believed in ancient Egypt that Geb's laughter created earthquakes and that he allowed crops to grow. The name was pronounced as such from the Greek period onward and was originally wrongly read as Seb. The oldest representation in a fragmentary relief of the god was as an anthropomorphic bearded being accompanied by his name, and dating from king Djoser's reign, 3rd Dynasty, and was found in Heliopolis. However, the god never received a temple of his own. In later times he could also be depicted as a ram, a bull or a crocodile (the latter in a vignette of the Book of the Dead of the lady Heryweben in the Egyptian Museum, Cairo). Geb was frequently feared as father of snakes (one of the names for snake was s3-t3 – "son of the earth"). In a Coffin Texts spell Geb was described as father of the mythological snake Nehebkau of primeval times. In more mythology, Geb also often occurs as a primeval divine king of Egypt from whom his son Osiris and his grandson Horus inherited the land after many conflicts with the disruptive god Set, brother and killer of Osiris. Geb could also be regarded as personified fertile earth and barren desert, the latter containing the dead or setting them free from their tombs, metaphorically described as "Geb opening his jaws", or imprisoning those there not worthy to go to the fertile North-Eastern heavenly Field of Reeds. In the latter case, one of his otherworldly attributes was an ominous jackal-headed stave (called wsr.t Mighty One') rising from the ground onto which enemies could be bound. In the Heliopolitan Ennead (a group of nine gods created in the beginning by the one god Atum or Ra), Geb is the husband of Nut, the sky or visible daytime and nightly firmament, the son of the earlier primordial elements Tefnut (moisture) and Shu ("emptiness"), and the father to the four lesser gods of the system – Osiris, Seth, Isis and Nephthys.