So they spoke, and both springing down from behind their horses
gripped each other's hands and exchanged the promise of friendship;
but Zeus the son of Kronos stole away the wits of Glaukos
who exchanged with Diomedes the son of Tydeus armour
of gold for bronze, for nine oxen's worth the worth of a hundred.

VI. 232–236. - The Iliad (c. 7th century BC)