注大乘入楞伽經 5.255

5.255

明唯除佛菩薩及大聲聞，見餘作無間業者，為勸發故，令除疑悔過，以神力變化示同其事，譬如闍王弒父，身生惡疾懺悔，佛教作實相觀，觀已惡疾即除，此闍王或是聖人化作。化作此者有何利益？欲勸實作外無間者發心懺悔也。

This explains that except for the Buddhas, bodhisattvas, and great śrāvakas, who, seeing others commit deeds of immediate retribution, manifest the same deeds through supernormal transformations in order to encourage them and cause them to eliminate doubt and repent of their faults. For example, when King Ajātaśatru killed his father, foul sores broke out on his body; upon repenting, the Buddha instructed him to cultivate the contemplation of dharmatā, and once contemplated, the foul sores were immediately eradicated. This King Ajātaśatru was perhaps an illusory manifestation created by a sage. What benefit is there in manifesting this? It is the wish to encourage those who have actually committed the external deeds of immediate retribution to resolve to repent.