The bulls snorted and spurted from their mouths devouring flames, like a perforated crucible when the leather bellows of the smith, sometimes ceasing… - Apollonius of Rhodes

Unconscionable Love, bane and tormentor of mankind, parent of strife, fountain of tears, source of a thousand ills, rise, mighty Power, and fall upon the sons of our enemies with all the force you used upon Medea when you filled her with insensate fury.

With that she went and fetched the box in which she kept her many drugs, healing or deadly, and putting it on her knees she wept. Tears ran unchecked in torrents down her cheeks and drenched her lap as she bemoaned her own sad destiny. She was determined now to take a poison from the box and swallow it; and in a moment she was fumbling with the fastening of the lid in her unhappy eagerness to reach the fatal drug. But suddenly she was overcome by the hateful thought of death, and for a long time she stayed her hand in silent horror. Visions of life and all its fascinating cares rose up before her. She thought of the pleasures that the living can enjoy. She thought of her happy playmates, as a young girl will. And now, setting its true value on all this, it seemed to her a sweeter thing to see the sun than it had ever been before. So, prompted by Hera, she changed her mind and put the box away.

And now, from somewhere in the bowels of the earth, from the smoky stronghold where they slept, the pair of bulls appeared, breathing flames of fire. The Argonauts were terrified at the sight. But Jason planting his feet apart stood to receive them... He held his shield in front of him, and the two bulls, bellowing loudly, charged and butted it with their strong horns...