Abhidharmakośa, Fascicle Nine

(Five) Original text:若缘起支。唯十二者。不说老死果。生死应有终。不说无明因。生死应有始。或应更立余缘起支。余复有余。成无穷失。不应更立。然无前过。此中世尊由义已显。云何已显。颂曰。从惑生惑业。从业生于事。从事事惑生。有支理唯此。

Explanation: If the links of dependent origination were only twelve links, and the effect of aging-and-death were not stated, then birth-and-death should have an end; if the cause of ignorance were not stated, then birth-and-death should have a beginning. Or else other links of dependent origination should be further established, and beyond those others yet others, which would create the fault of endlessness; therefore no further links should be established. In this way there is none of the previous faults. This principle has already been revealed by the World-Honored One through its meaning. How has it been revealed? There is a verse that says: from delusion arise delusion and karmic formations; from karmic formations arise the functions of events; from events arise events and delusion; the principle of the links of existence is only this.

Original text:论曰。从惑生惑。谓爱生取。从惑生业。谓取生有。无明生行。从业生事。谓行生识。及有生生。从事生事。谓从识支生于名色。乃至从触生于受支。及从生支生于老死。从事生惑。谓受生爱。由立有支。其理唯此。已显老死。为事惑因。及显无明。为事惑果。无明老死事。惑性故。岂假更立余缘起支。故经言如是。纯大苦蕴集。若不尔者。此言何用。

Explanation: The treatise says: from delusion arises delusion, which refers to the process of craving giving rise to grasping; from delusion arise karmic formations, which refers to the process of grasping giving rise to existence and of ignorance giving rise to volitional formations; from karmic formations arise the functions of events, which refers to the process of volitional formations giving rise to the six consciousnesses and of existence giving rise to birth; from the functions of events arise events, which refers to the process of consciousness giving rise to name-and-form, of contact giving rise to feeling, and of birth giving rise to aging-and-death; from the functions of events arises delusion, which refers to the process of feeling giving rise to craving.