Giobbe 39:18

What time she lifteth up herself on high, she scorneth the horse and his rider. She lifteth up herself - When she raiseth up herself to run away. Proofs of the fleetness of this bird have already been given. It neither flies nor runs distinctly, but has a motion composed of both; and, using its wings as sails, makes great speed. So Claudian: -

Vasta velut Libyae venantum vocibus ales

Cum premitur, calidas cursu transmittit arenas,

Inque modum veli sinuatis flamine pennis

Pulverulenta volat.

"Xenophon says, Cyrus had horses that could overtake the goat and the wild ass; but none that could reach this creature. A thousand golden ducats, or a hundred camels, was the stated price of a horse that could equal their speed." - Dr. Young.