四分律行事鈔資持記 1.794

1.794

三殺中。六七違恩，第八違福，及下第九即障他正道，第十兼違恩福。五皆違反中極，總號五逆。若有犯者，必墮阿鼻，亦號五無間業。

Under "three killings": The sixth and seventh violate kindness; the eighth violates merit; and the ninth below obstructs another's right path; the tenth combines violating both kindness and merit. All five go against the utmost bounds, and are collectively designated the five heinous deeds (ānantarya-karma). If anyone commits them, they are bound to fall into Avīci, and are also designated the five actions of immediate retribution.