The Cult
Apsû had no independent priesthood or festival; his cult was embedded in the temples of Enki/Ea and in the hydraulic symbolism of Mesopotamian sanctuaries. The abzu shrine at Eridu, repeatedly rebuilt from the Ubaid period onward, was understood as the cosmic freshwater source upon which the god dwelt, and libations of water were a routine offering at Ea's cella in Esagila at Babylon. Temple basins, drainage channels, and stepped platforms evoked the primordial deep. Because Apsû was a place and a cosmic condition more than a personal god, worship of him was inseparable from the service of the water-god to whom his abyss belonged.


