Statistics for occurrence #1 of “Euphrates” in book 8, card 674 of P. Vergilius Maro, Aeneid:
...d: in long file
the vanquished peoples pass, of alien tongues,
of arms and vesture strange. Here Vulcan showed
ungirdled Afric chiefs and Nomads bold,
Gelonian bowmen, men of Caria,
and Leleges. Euphrates seemed to flow
with humbler wave; the world's remotest men,
Morini came, with double-horned Rhine,
and Dahae, little wont to bend the knee,
and swift Araxes, for a bridge too proud.
...