瑜伽論記 17.161

17.161

解云：若薩婆多以方便業資根本業招異熟果，正以根本業招人等流果，以後起業資根本業得增上果，雖復相資有果而同根本業，得此三果故一業果。

Explanation: According to the Sarvāstivāda, the preliminary action assists the fundamental action to bring about the ripening fruit (*vipāka-phala*); the fundamental action properly brings about the fruit of natural outflow (*niṣyanda-phala*) in human beings; and the subsequent action assists the fundamental action to obtain the sovereign fruit (*adhipati-phala*). Although mutual assistance produces the fruits, they are unified with the fundamental action; since one obtains these three fruits, they are the fruit of a single action.