瑜伽論記 9.311

9.311

三藏云：失作道下四行為方便，後起無漏，不須作行能知彼心，知他有漏心時亦先作苦集八行方得知。又無漏心知有漏心，如佛他心通體是無漏，通知一切漏無漏心。

The Tripiṭaka Master says: At the outset, one takes the performance of the four aspects under the path as preliminary means; subsequently giving rise to the taintless, one does not need to perform these aspects to be able to know that mind. When knowing others' tainted minds, one also first performs the eight aspects of suffering and origination before being able to know them. Furthermore, a taintless mind knows a tainted mind; for instance, the Buddha's supernormal knowledge of others' minds is essentially taintless, yet its supernormal cognition knows all tainted and taintless minds.