The Odyssey 12.297–302
no man may slay either cow or sheep in the blind folly of his mind; but be content to eat the food which immortal Circe gave.’
“So I spoke; and they straightway swore that they would not, even as I bade them. But when they had sworn and made an end of the oath,
Εὐρύλοχʼ, ἦ μάλα δή με βιάζετε μοῦνον ἐόντα.
ἀλλʼ ἄγε νῦν μοι πάντες ὀμόσσατε καρτερὸν ὅρκον·
εἴ κέ τινʼ ἠὲ βοῶν ἀγέλην ἢ πῶυ μέγʼ οἰῶν
εὕρωμεν, μή πού τις ἀτασθαλίῃσι κακῇσιν
ἢ βοῦν ἠέ τι μῆλον ἀποκτάνῃ· ἀλλὰ ἕκηλοι
ἐσθίετε βρώμην, τὴν ἀθανάτη πόρε Κίρκη.