《后汉书·列传·杨震列传》
葬前十几天，有大鸟高丈余，飞到杨震丧前，俯仰悲鸣，泪流湿地，葬完，才飞去。
先葬十余日，有大鸟高丈余，集震丧前，俯仰悲鸣，泪下沾地，葬毕，乃飞去。
About ten days before the time of the funeral, a great bird several meters high flew to the place where Yang Zhen’s coffin lay. It cried sadly, with its head to the ground and its feathers ruffled, and its tears wet the ground. It only flew away after the funeral was over.