Which excerpt below is an example of a portent?

“At his last words a bird flew past on the right, / an eagle clutching a huge white goose in its talons,…”
“Farewell, my princes! Give my warm greetings / to Nestor, the great commander / always kind to me as a father, long ago…”
“When young Dawn with her rose-red fingers shone once more / they yoked their pair again, mounted a blazoned car…”
“Your father’s old, in love with this hospitality; / I fear he’ll hold me, chafing in his palace – / I must hurry home.”