成唯識論述記 9.51

9.51

述曰：我、法二執必無明俱，非善心中有無明故，彼無癡善根性相違故。彼前師言，此有何失？我如汝小乘尋、伺俱起，尋、伺性順，可許俱起，善心、無明性便相返。

The Commentary states: The two graspings of self and phenomena are necessarily associated with avidyā. It is not that avidyā exists within a wholesome mind, because its nature is contrary to the wholesome root of non-delusion (amoha). The former master says: What fault is there in this? I am like your Hīnayāna vitarka and vicāra arising together: vitarka and vicāra have conforming natures and may be admitted to arise together, but a wholesome mind and avidyā have contrary natures.