瑜伽論記 8.55

8.55

言喜樂者，謂已獲得所希求義故等者，景云：樂是喜受非倚數也，謂此喜受令身適悅名樂。基云：此據利根第九解脫道，是入根本靜慮人，故言生喜樂，若鈍根人第九解脫道居近分定已後，方能入根本起生喜樂。

Regarding "joy and bliss: namely, because one has already attained the desired object and so forth": Jing says that bliss is the feeling of joy, not the mental factor of pliancy; that is, this feeling of joy making the body pleased is called bliss. Ji says: This is based on those of sharp faculties in the ninth path of liberation who are persons entering the fundamental dhyāna, hence it says 'arising of joy and bliss'; if it is a person of dull faculties, the ninth path of liberation resides in the threshold concentration, and only afterwards can they enter the fundamental and give rise to joy and bliss.