《资治通鉴·晋纪·晋纪二十九》
可是姚苌却不如犬马那般知道被主人养育的恩德，亲自做出大逆不道的事。
曾不如犬马识所养之恩，亲为大逆。
But Yao Chang is not even as good as a dog and doesn't appreciate the grace of the master who raised him. He personally committed the most heinous crimes.