妙法蓮華經玄贊 6.186

6.186

其傍生趣，更相殘害。如羸弱者為諸強力之所殺害。受種種苦。以不自在他所驅馳、多被鞭撻，與彼人天為資生具。由此因緣具受種種極重苦惱。

In the animal destiny, they mutually harm each other. For instance, the weak are slaughtered by the strong. They suffer various pains. Because they are not independent, they are driven by others, frequently whipped, and serve as sustenance for humans and devas. Due to these causes and conditions, they fully undergo diverse kinds of extremely severe suffering and distress.