Ninurta (: , possible meaning "Lord [of] Barley"), also known as Ninĝirsu (: , meaning "Lord [of] Girsu"), is an ancient Mesopotamian god associated with farming, healing, hunting, law, scribes, and war who was first worshipped in early Sumer. In the earliest records, he is a god of agriculture and healing, who cures humans of sicknesses and releases them from the power of demons. In later times, as Mesopotamia grew more militarized, he became a warrior deity, though he retained many of his earlier agricultural attributes. He was regarded as the son of the chief god Enlil and his main cult center in Sumer was the Eshumesha temple in Nippur. Ninĝirsu was honored by King Gudea of Lagash (ruled 2144–2124 BC), who rebuilt Ninĝirsu's temple in Lagash. Later, Ninurta became beloved by the Assyrians as a formidable warrior. The Assyrian king Ashurnasirpal II (ruled 883–859 BC) built a massive temple for him at Kalhu, which became his most important cult center from then on. In the epic poem Lugal-e, Ninurta slays the demon Asag using his talking mace Sharur and uses stones to build the Tigris and Euphrates rivers to make them useful for irrigation. In a poem sometimes referred to as the "Sumerian Georgica", Ninurta provides agricultural advice to farmers. In an Akkadian myth, he was the champion of the gods against the Anzû bird after it stole the Tablet of Destinies from his father Enlil and, in a myth that is alluded to in many works but never fully preserved, he killed a group of warriors known as the "Slain Heroes". His major symbols were a perched bird and a plow. Ninurta may have been the inspiration for the figure of Nimrod, a "mighty hunter" who is mentioned in association with Kalhu in the Book of Genesis. Conversely, and more conventionally, the mythological Ninurta may have been inspired by a historical person, such as Ninus. He may also be mentioned in the Second Book of Kings under the name Nisroch. In the nineteenth century, Assyrian stone reliefs of winged, eagle-headed figures from the temple of Ninurta at Kalhu were commonly, but erroneously, identified as "Nisrochs" and they appear in works of fantasy literature from the time period. Worship Ninurta was worshipped in Mesopotamia as early as the middle of the third millennium BC by the ancient Sumerians, and is one of the earliest attested deities in the region.