The Aeneid by Virgil Book 2 Page 14

ground with shield and quivering spear. Straightway Calchas prophesies that the seas must be essayed in flight, and that Pergamus cannot be uptorn by Argive weapons, unless they seek new omens at Argos, and escort back the deity, whom they have taken away overseas in their curved ships.

And now that before the wind they are bound for their native Mycenae, it is but to get them forces and attendant gods; then, recrossing the sea, they will be here unlooked for. So Calchas interprets the omens. This image, at his warning, they have set up in atonement for the Palladium, for the insult to deity, and to expiate the woeful sacrilege. Yet Calchas bade them raise this mass of interlaced timbers so huge, and to built it up to heaven, so that it might find no entrance at the gates, be drawn within the walls, or guard the people