Abatur (sometimes called Abathur, Yawar and the Ancient of Days) is the third of four emanations from the supreme, unknowable deity in the Mandaean religion. His name translates as the "father of the Uthre", the Mandaean name for celestial beings. His usual epithet is the Ancient (Atiga) and he is also called the deeply hidden and guarded. He is described as being the last son of the Second Life, or Yoshamin, the most important figure in Mandaean religion and the one from whom they took their name.He exists in two different personae. These include Abatur Rama (the "lofty" or celestial Abatur), and his "lower" counterpart, Abatur of the Scales, who weighs the souls of the dead to determine their fate.
Abatur in Diwan Abatur
He is one of the main characters in the book the Diwan Abatur, one of the more comparatively recent texts of the Madaeans. The text begins with a lacuna. He is said to reside on the borderland between the here and the hereafter, at the farthest verge of the Worlds
Source:
http://en.wikipedia.org/wiki/Abathur