大般涅槃經義記 10.128

10.128

次觀業因。於中初先結前生後；下正辨之，愛無明觸是其因也。從無明觸生於愛心，從愛起於身口意業。

Next is contemplating the causes of karma. Within this, it first concludes the preceding and introduces what follows; below, it directly distinguishes it: craving and contact with ignorance are its causes. From contact with ignorance, the mind of craving arises; from craving, karma of body, speech, and mind is initiated.