No inscriptions of this son of Išme-Dagan I
have been found. According to letters found at Mari, Mut-Aškur temporarily took
the throne of Ekallātum, while his father was gravely ill and residing
in Babylon. During this time a coup d'état was attempted, which
involved Atamrum, the king of Allahad, the local inhabitants of
Ekallātum, and a man named Hammutar, who is said (letter 26 370) to
have "tied up" Mut-Aškur. Scholars do not yet agree, however, on how
the events evolved. According to Charpin (ARM 26/2, 155), the plot saw
the Ekallateans and the king of Allahad conspiring to replace
Išme-Dagan with the son, who at that time was Hammutar's prisoner. Heimpel (2003, 64) sees instead Mut-Aškur (as representative of Išme-Dagan) as a victim of the uprising, and Hammutar the man designated by Atamrum and the Ekallateans to be the new king of the city.
Letters from Mari inform us as well that Mut-Aškur marched with 2,000 Ekallatean and Assyrian troops and 2,000 Babylonians to the city Katara, but he was forced to retreat when he encountered reinforcements sent from Mari.
During the reign of his father, he was arranged to marry a daughter of
Zaziya, king of Turukku (a Hurrian kingdom in the Zagros); the
marriage itself, however, never took place (Ziegler 2014-6).
Mut-Aškur's reign is not included in the known copies of the Assyrian King List. However, it is mentioned in the king list preserved on fragment
VAT 9812 [/riao/KingLists/FragmentVAT9812/index.html].
Yehonatan Hershkovitz & Nathan Morello
Yehonatan Hershkovitz & Nathan Morello, 'Mut-Aškur', RIA 1: Inscriptions from the Origins of Assyria to Arik-dīn-ili, The RIA Project, 2024 [http://oracc.org/OldAssyrianPeriod/Samsi-AdduDynasty/Mut-Ashkur/]