When Heracles reached adulthood, Hera drove him mad, which led him to murder his family and this later led to him undertaking his famous labours. Hera assigned Heracles to labour for King Eurystheus at Mycenae. She attempted to make almost all of Heracles's twelve labours more difficult. When he fought the Lernaean Hydra, she sent a crab to bite at his feet in the hopes of distracting him. Later Hera stirred up the Amazons against him when he was on one of his quests. When Heracles took the cattle of Geryon, he shot Hera in the right breast with a triple-barbed arrow: the wound was incurable and left her in constant pain, as Dione tells Aphrodite in the Iliad, Book V. Afterwards, Hera sent a gadfly to bite the cattle, irritate them and scatter them. Hera then sent a flood which raised the water level of a river so much that Heracles could not ford the river with the cattle. He piled stones into the river to make the water shallower. When he finally reached the court of Eurystheus, the cattle were sacrificed to Hera.
When Heracles reached adulthood, Hera drove him mad, which led him to murder his family and this later led to him undertaking his famous labours. Hera assigned Heracles to labour for King Eurystheus at Mycenae. She attempted to make almost all of Heracles's twelve labours more difficult. When he fought the Lernaean Hydra, she sent a crab to bite at his feet in the hopes of distracting him. Later Hera stirred up the Amazons against him when he was on one of his quests. When Heracles took the cattle of Geryon, he shot Hera in the right breast with a triple-barbed arrow: the wound was incurable and left her in constant pain, as Dione tells Aphrodite in the Iliad, Book V. Afterwards, Hera sent a gadfly to bite the cattle, irritate them and scatter them. Hera then sent a flood which raised the water level of a river so much that Heracles could not ford the river with the cattle. He piled stones into the river to make the water shallower. When he finally reached the court of Eurystheus, the cattle were sacrificed to Hera.