Hellenistic version
There is an older version than the one related by Ovid in his Metamorphoses, which is a moral tale in which the proud and unfeeling Narcissus is punished by the gods for having spurned all his male suitors (see
pederasty in ancient Greece). It is thought to have been intended as a cautionary tale addressed to adolescent boys. Until recently, the only source for this version was a segment in Pausanias (9.31.7), about 150 years after Ovid. A very similar account was discovered among the Oxyrhynchus papyri in 2004, however, an account that predates Ovid's version by at least fifty years.
In this story, Ameinias, a young man, loved Narcissus but was scorned. To tell Ameinias off, Narcissus gave him a sword. Ameinias used the sword to kill himself on Narcissus' doorstep and prayed to
Nemesis that Narcissus would one day know the pain of unrequited love. This curse was fulfilled when Narcissus became entranced by his reflection in the pool and tried to seduce the beautiful boy, not realizing it was himself he was looking at. He only realized that it was his reflection after trying to kiss it. Completing the symmetry of the tale, Narcissus took his sword and killed himself from sorrow. His corpse then turned into a flower.