PEGASUS

PEGASUS
With this grave retinue he trod the grove
And pray’d the Fauns he might a Poe-et prove.
But sad to tell, ere Pegasus flew high,
The not unrelish’d supper hour drew nigh;
Our tuneful swain th’ imperious call attends,
And soon above the groaning table bends."
H.P. Lovecraft, The Poe-et's Nightmare 
 

"But when Perseus had cut off the head of Medousa there sprang from her blood stout-hearted Khrysaor and the horse Pegasos so named from the pegai (springs) of Okeanos, where he was born." 
Hesiod, Theogony

"While deep sleep held fast Medusa and her snakes, he [Perseus] severed her head clean from her neck; and from their mother's blood swift-flying Pegasus and his brother [Khrysaor] sprang." 
Ovid, Metamorphoses

"Men believe it [Pegasos] sprang with its blood-spattered mane from the butchered Medusa’s pregnant neck."

Ovid, Fasti