Third labour of Heracles
Eurystheus and Hera were greatly angered to find that Hercules had managed to escape from the claws of the Nemean Lion and the fangs of the Lernaean Hydra, and so decided to spend more time thinking up a third task that would spell doom for the hero. The third task did not involve killing a beast, as it had already been established that Hercules could overcome even the most fearsome opponents, so Eurystheus decided to make him capture the female Ceryneian Hind, as it was so fast it could outrun an arrow.
When the sun is in the sign of Scorpio, the constellation Hercules rises. The Greeks referred to the constellation of Hercules as the Stag (hind is another word for doe), the identification of the constellation with Hercules was made by the Romans.