成唯識論演祕 3.81

3.81

准有宗義，身、邊二見是遍行因，體是無記，遍與同地五部染法而為其因。五部染中既有不善，故得因果成異性也。若爾，云何得等流果？俱是染故，名為等流。

According to the tenets of the Sarvāstivāda school, the two views of identity and extremes are omnipresent causes; their essence is avyākṛta, and they serve universally as causes for the defiled dharmas of the five categories in the same plane. Since among the defilements of the five categories there are unwholesome ones, the cause and effect can indeed become of different natures. If so, how do they obtain a fruit of similar outflow (niṣyanda-phala)? Because both are defiled, it is called similar outflow.