Then they hurled their lances at his shield, but the spear-points turned like lead; and Caineus tried to throw him, but he never stirred a foot; and Polydeuces struck him with his fist a blow which would have killed an ox, but Jason only smiled, and the heroes danced about him with delight; and he leapt, and ran, and shouted in the joy of that enormous strength, till the sun rose, and it was time to go and to claim Aietes' promise.
So he sent up Telamon and Aithalides to tell Aietes that he was ready for the fight; and they went up among the marble walls, and beneath the roofs of gold, and stood in Aietes' hall, while he grew pale with rage.
'Fulfil your promise to us, child of the blazing Sun.

Give us the serpents' teeth, and let loose the fiery bulls; for we have found a champion among us who can win the golden fleece.' And Aietes bit his lips, for he fancied that they had fled away by night: but he could not go back from his promise; so he gave them the serpents' teeth.
Then he called for his chariot and his horses, and sent heralds through all the town; and all the people went out with him to the dreadful War-god's field.
And there Aietes sat upon his throne, with his warriors on each hand, thousands and tens of thousands, clothed from head to foot in steel chain-mail.

And the people and the women crowded to every window and bank and wall; while the Minuai stood together, a mere handful in the midst of that great host.
And Chalciope was there and Argus, trembling, and Medeia, wrapped closely in her veil; but Aietes did not know that she was muttering cunning spells between her lips.
Then Jason cried, 'Fulfil your promise, and let your fiery bulls come forth.' Then Aietes bade open the gates, and the magic bulls leapt out.

Their brazen hoofs rang upon the ground, and their nostrils sent out sheets of flame, as they rushed with lowered heads upon Jason; but he never flinched a step.

The flame of their breath swept round him, but it singed not a hair of his head; and the bulls stopped short and trembled when Medeia began her spell.
Then Jason sprang upon the nearest and seized him by the horn; and up and down they wrestled, till the bull fell grovelling on his knees; for the heart of the brute died within him, and his mighty limbs were loosed, beneath the steadfast eye of that dark witch-maiden and the magic whisper of her lips.
So both the bulls were tamed and yoked; and Jason bound them to the plough, and goaded them onward with his lance till he had ploughed the sacred field.
And all the Minuai shouted; but Aietes bit his lips with rage, for the half of Jason's work was over, and the sun was yet high in heaven.
Then he took the serpents' teeth and sowed them, and waited what would befall.