Apollodorus Labor 11
Eurystheus set Hercules on the extra task of fetching the golden apples from the Hesperides that had been given to Zeus as a wedding gift and were guarded by a dragon with 100 heads, offspring of Typhon and Echidna. On this journey he wrestled Nereus for information and Antaeus to pass through his country of Libya. On his travels he found Prometheus and destroyed the eagle that was eating his liver. Prometheus told Hercules not to go after the apples himself, but to send Atlas instead. When Hercules reached the land of the Hyperboreans, where Atlas held the heavens, Hercules volunteered to hold the heavens while Atlas got the apples. Atlas did so, but didn't want to resume the burden, so he said he'd carry the apples to Eurystheus. Trickily, Hercules agreed, but asked Atlas to take back the heavens for a moment so he could rest a pad on his head. Atlas agreed and Hercules went away with the apples. When he gave them to Eurystheus, the king returned them. Hercules gave them to Athena to return them to the Hesperides.
