Isimud was a Mesopotamian god regarded as the divine attendant (sukkal) of the god Enki (Ea). He was depicted with two faces. No references to temples dedicated to him are known, though ritual texts indicate he was worshiped in Uruk and Babylon. He was also incorporated into Hurrian religion and Hittite religion. In myths, he appears in his traditional role as a servant of Enki.

Sukkal was a term which could denote both a type of official and a class of deities in ancient Mesopotamia. The historical sukkals were responsible for overseeing the execution of various commands of the kings and acted as diplomatic envoys and translators for foreign dignitaries. The deities referred to as sukkals fulfilled a similar role in mythology, acting as servants, advisors and envoys of the main gods of the Mesopotamian pantheon, such as Enlil or Inanna. The best known sukkal is the goddess Ninshubur. In art, they were depicted carrying staves, most likely understood as their attribute. They could function as intercessory deities, believed to mediate between worshipers and the major gods.