瑜伽論記 15.502

15.502

三、性染不成失。謂亦可得說性染慧由相應染，不可得說非無明體成無明性。

Third, the fault of intrinsic defilement failing to be established. That is, one can say that wisdom whose nature is defiled is so due to associated defilement, but one cannot say that what is not the entity of ignorance becomes the nature of ignorance.