from Argonautica 1.9.16-28
[16] Aeson, son of Cretheus, had a son Jason by Polymede, daughter of Autolycus. Now Jason dwelt in Iolcus, of which Pelias was king after Cretheus. But when Pelias consulted the oracle concerning the kingdom, the god warned him to beware of the man with a single sandal. At first the king understood not the oracle, but afterwards he apprehended it. For when he was offering a sacrifice at the sea to Poseidon, he sent for Jason, among many others, to participate in it. Now Jason loved husbandry and therefore abode in the country, but he hastened to the sacrifice, and in crossing the river Anaurus he lost a sandal in the stream and landed with only one. When Pelias saw him, he bethought him of the oracle, and going up to Jason asked him what, supposing he had the power, he would do if he had received an oracle that he should be murdered by one of the citizens. Jason answered, whether at haphazard or instigated by the angry Hera in order that Medea should prove a curse to Pelias, who did not honor Hera, “ I would command him,” said he, “ to bring the Golden Fleece. ” No sooner did Pelias hear that than he bade him go in quest of the fleece. Now it was at Colchis in a grove of Ares, hanging on an oak and guarded by a sleepless dragon…
[23] …When the ship was brought into port, Jason repaired to Aeetes, and setting forth the charge laid on him by Pelias invited him to give him the fleece. The other promised to give it if single-handed he would yoke the brazen-footed bulls. These were two wild bulls that he had, of enormous size, a gift of Hephaestus; they had brazen feet and puffed fire from their mouths. These creatures Aeetes ordered him to yoke and to sow dragon's teeth; for he had got from Athena half of the dragon's teeth which Cadmus sowed in Thebes. While Jason puzzled how he could yoke the bulls, Medea conceived a passion for him; now she was a witch, daughter of Aeetes and Idyia, daughter of Ocean. And fearing lest he might be destroyed by the bulls, she, keeping the thing from her father, promised to help him to yoke the bulls and to deliver to him the fleece, if he would swear to have her to wife and would take her with him on the voyage to Greece. When Jason swore to do so, she gave him a drug with which she bade him anoint his shield, spear, and body when he was about to yoke the bulls; for she said that, anointed with it, he could for a single day be harmed neither by fire nor by iron. And she signified to him that, when the teeth were sown, armed men would spring up from the ground against him; and when he saw a knot of them he was to throw stones into their midst from a distance, and when they fought each other about that, he was taken to kill them. On hearing that, Jason anointed himself with the drug, and being come to the grove of the temple he sought the bulls, and though they charged him with a flame of fire, he yoked them. And when he had sowed the teeth, there rose armed men from the ground; and where he saw several together, he pelted them unseen with stones, and when they fought each other he drew near and slew them. But though the bulls were yoked, Aeetes did not give the fleece; for he wished to burn down the Argo and kill the crew. But before he could do so, Medea brought Jason by night to the fleece, and having lulled to sleep by her drugs the dragon that guarded it, she possessed herself of the fleece and in Jason's company came to the Argo. She was attended, too, by her brother Apsyrtus. And with them the Argonauts put to sea by night.
[24] When Aeetes discovered the daring deeds done by Medea, he started off in pursuit of the ship; but when she saw him near, Medea murdered her brother and cutting him limb from limb threw the pieces into the deep. Gathering the child's limbs, Aeetes fell behind in the pursuit; wherefore he turned back, and, having buried the rescued limbs of his child, he called the place Tomi…
[27] Now Pelias, despairing of the return of the Argonauts, would have killed Aeson; but he requested to be allowed to take his own life, and in offering a sacrifice drank freely of the bull's blood and died.1 And Jason's mother cursed Pelias and hanged herself, leaving behind an infant son Promachus; but Pelias slew even the son whom she had left behind. On his return Jason surrendered the fleece, but though he longed to avenge his wrongs he bided his time. At that time he sailed with the chiefs to the Isthmus and dedicated the ship to Poseidon, but afterwards he exhorted Medea to devise how he could punish Pelias. So she repaired to the palace of Pelias and persuaded his daughters to make mince meat of their father and boil him, promising to make him young again by her drugs; and to win their confidence she cut up a ram and made it into a lamb by boiling it. So they believed her, made mince meat of their father and boiled him. But Acastus buried his father with the help of the inhabitants of Iolcus, and he expelled Jason and Medea from Iolcus.
[28] They went to Corinth, and lived there happily for ten years, till Creon, king of Corinth, betrothed his daughter Glauce to Jason, who married her and divorced Medea. But she invoked the gods by whom Jason had sworn, and after often upbraiding him with his ingratitude she sent the bride a robe steeped in poison, which when Glauce had put on, she was consumed with fierce fire along with her father, who went to her rescue.1 But Mermerus and Pheres, the children whom Medea had by Jason, she killed, and having got from the Sun a car drawn by winged dragons she fled on it to Athens.2 Another tradition is that on her flight she left behind her children, who were still infants, setting them as suppliants on the altar of Hera of the Height; but the Corinthians removed them and wounded them to death.
Medea came to Athens, and being there married to Aegeus bore him a son Medus. Afterwards, however, plotting against Theseus, she was driven a fugitive from Athens with her son. But he conquered many barbarians and called the whole country under him Media, and marching against the Indians he met his death. And Medea came unknown to Colchis, and finding that Aeetes had been deposed by his brother Perses, she killed Perses and restored the kingdom to her father.