首楞嚴義疏注經 8.485

8.485

「復次阿難！鬼業既盡，則情與想二俱成空，方於世間與元負人怨對相值，身為畜生，酬其宿債。」

"Furthermore, Ānanda! When the ghosts' karma is exhausted, both emotion and thought become empty. Only then, in the world, do they meet face-to-face with the ones they originally owed, becoming animals to repay their past debts."