[2.5.5]The fifth labour he laid on him was to carry out the dung of the cattle of Augeas in a single day. Now Augeas was king of Elis; some say that he was a son of the Sun, others that he was a son of Poseidon, and others that he was a son of Phorbas; and he had many herds of cattle. Hercules accosted him and without revealing the command of Eurystheus, said that he would carry out the dung in one day if Augeas would give him the tithe of the cattle. Augeas was incredulous, but promised. Having taken Augeas's son Phyleus to witness, Hercules made a breach in the foundations of the cattle-yard, and then, diverting the courses of the Alpheus and Peneus, which flowed near each other, he turned them into the yard, having first made an outlet for the water through another opening. When Augeas learned that this had been accomplished at the command of Eurystheus, he would not pay the reward; nay more, he denied that he had promised to pay it, and on that point he professed himself ready to submit to arbitration. The arbitrators having taken their seats, Phyleus was called by Hercules and bore witness against his father, affirming that he had agreed to give him a reward. In a rage Augeas, before the voting took place, ordered both Phyleus and Hercules to pack out of Elis. So Phyleus went to Dulichium and dwelt there, and Hercules repaired to Dexamenus at Olenus. He found Dexamenus on the point of betrothing perforce his daughter Mnesimache to the centaur Eurytion, and being called upon by him for help, he slew Eurytion when that centaur came to fetch his bride. But Eurystheus would not admit this labour either among the ten, alleging that it had been performed for hire.

SOURCE: Loeb Apollodorus, translated by Sir James G. Frazer, 1921.