AITHON, PHLOGIOS, KONABOS & PHOBOS were the four fire-breathing, immortal immortal horses which drew the chariot of the god Ares.

"[Aphrodite was wounded by Diomedes in the Trojan War] Dropping on one knee before her beloved brother [Ares] in deep supplication she asked for his gold-bridled horses: ‘Beloved brother, rescue me and give me your horses so I may come to Olympos where is the place of the immortals ... ’
So she spoke, and Ares gave her the gold-bridled horses, and, still grieved in the inward heart, she mounted the chariot and beside her entering Iris gathered the reins up and whipped them into a run, and they winged their way unreluctant. Now as they came to sheer Olympos, the place of the immortals, there swift Iris the wind-footed reined in her horses and slipped them from the yoke and threw fodder immortal before them." - Homer, Iliad 5.352

"[Ares] ordered Phobos (Fear) and Deimos (Terror) to harness his horses, and himself got into his shining armour." - Homer, Iliad 15.110

K9.1 ARES' HORSES

"Ares insatiable in battle, blazing like the light of burning fire in his armour and standing in his chariot, and his running horses trampled and dented the ground with their hooves, and the dust swirled up around them, beaten up between the compacted chariot and the feet of the horses, and the well-put-together chariots and their rails clattered to the gallop of the straining horses." - Hesiod, The Shield of Heracles 56

"Phobos (Panic) and Deimos (Terror) drove their smooth-running chariot and horses close up to him [Ares when he was wounded by Herakles], and lifted him from the wide-wayed earth and set him in the elaborate chariot and presently lashed on the horses, and they made their way to tall Olympos." - Hesiod, The Shield of Heracles 460

"And [depicted] on the shield [of Herakles] stood the fleet-footed horses of grim Ares .... he was red with blood as if he were slaying living men, and he stood in his chariot. Beside him stood Deimos (Fear) and Phobos (Flight), eager to plunge amidst the fighting men." - Hesiod, Shield of Heracles 191

"Ares, exceeding in strength, chariot-rider ... who whirl your fiery sphere [the star Mars] among the planets in their sevenfold courses through the aither wherein your blazing steeds ever bear you above the third firmament of heaven." - Homeric Hymn 8 to Ares

"Murderous Ares came [to the battlefields of Troy], unmarked of other Gods, down from the heavens, eager to help the warrior sons of Troy. Aithon (Red-fire) and Phlogeus (Flame), Konabos (Tumult) and Phobos (Panic-fear), his car-steeds, bare him down into the fight, the coursers which to roaring Boreas grim-eyed Erinnys bare, coursers that breathed life-blasting flame: groaned all the shivering air, as battleward they sped. Swiftly he came to Troy: loud rang the earth beneath the feet of that wild team." - Quintus Smyrnaeus, Fall of Troy 8.239

"Gradivus [Ares] ... leaning upon his spear he leapt into his bloodstained chariot and cracked his whip and lashed his team and, plunging through the sky, stood on the sylvan peak of Palatium [in Rome]." - Ovid, Metamorphoses 14.820

"Such [of the finest horses] was Cyllarus, tamed by the reins of Amyclaean Pollux, and those whose fame Greek poets recount, the two steeds of Mars [Ares], and the pair of the great Achilles.- Virgil, Georgics 3.89

"Iovis Terrorque Pavorque (Fear and Dread), the horses of Mars [Ares]." - Valerius Flaccus, Argonautica 3.89

"Earth trembles, and horned [river] Hebrus bellows and stays his torrent’s flow; then all the war-steeds that troubled the valley sped foaming o’er the frightened meads, sure sign of his [Ares] approach ... Glorious in Hyrcanian gore he himself [Ares] comes riding by ... with bloody hand dark Bellona [Enyo] guides the team and plies them hard with her long spear." - Statius, Thebaid 7.64

"Loftily does the Bistonian [Thracian] steed bear Mars [Ares] when the fighting is done, exulting in the mighty weight, and swiftly flies by the river till he is all asteam and with his strong blowing stirs up the waves of Strymon [a Thracian River]." - Statius, Silvae 1.1.18

"In hot haste he [Ares] leapt up, and awoke Phobos (Rout) and Deimos (Terror) to yoke his deadly quickrunning car. They obeyed their urgent father. Furious Demos set the crooktooth bit in the horses’ mouths, and fastened their obedient necks under the yokestrap, and fitted the neckloop on each: Ares mounted the car, and Phobos took the reins and drove his father’s chariot." - Nonnus, Dionysiaca 29.364

Sources:

• Homer, The Iliad - Greek Epic C9th-8th BC
• Hesiod, Shield of Heracles - Greek Epic C8th-7th BC
• The Homeric Hymns - Greek Epic C8th-4th BC
• Quintus Smyrnaeus, Fall of Troy - Greek Epic C4th AD
• Ovid, Metamorphoses - Latin Epic C1st BC - C1st AD
• Virgil, Georgics - Latin Idyllic C1st BC
• Valerius Flaccus, The Argonautica - Latin Epic C1st AD
• Statius, Thebaid - Latin Epic C1st AD
• Statius, Silvae - Latin Epic C1st AD
• Nonnos, Dionysiaca - Greek Epic C5th AD