A witness of what happens
In the story the odyssey if that's what you are talking about then the sign was the two eagles dropping down on the congregation(group of people) fighting with their sharp talons ripping each other apart and its impending doom for them.
(delete the comment below your question i put it there because i thought i wasn't going to be able to comment the answer because 2 people were answering)
White Fang came in until he touched Gray Beaver's knee
At the sound, Kiche leaped snarling to the end of her stick, and there raged terribly because she could not come to his aid. But Gray Beaver laughed loudly
Both nose and tongue had been scorched by the live thing, sun-colored, that had grown up under Gray Beaver's hands