首楞嚴義疏注經 4.121

4.121

「以人食羊，羊死為人，人死為羊，如是乃至十生之類，死死生生，互來相噉，惡業俱生，窮未來際，是等則以盜貪為本。」

"Because a human eats a sheep, when the sheep dies it becomes a human, and when the human dies he becomes a sheep; in this way, up to the classes of the ten modes of birth, dying and being born, they mutually devour one another. Evil karma arises together, exhausting the limits of the future; such things have greed for stealing as their basis."