Ninurta and the turtle

Against Ninurta, Enki fashioned a turtle from the clay of the abzu. Against him he stationed the turtle at an opening, at the gate of the abzu. Enki talked to him near the place of the ambush and brought him to the place where the turtle was. The turtle was able to grab Ninurta's tendon from behind. The hero Ninurta managed to turn back its feet. Enki, as if perplexed, said, "What is this!" He had the turtle scrape the ground with its claws, had it dig an evil pit. The hero Ninurta fell into it with the turtle. The hero did not know how to get out from xx. The turtle kept on gnawing his feet with its claws (?).