瑜伽師地論略纂 9.18

9.18

論經解得離生喜樂中，「言離者，謂已獲得加行究竟作意故；言生者，由此為因，由此為緣，無間所生故；言喜樂者，謂已獲得所希求義故」者，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，已後方能入根本地生喜樂。

Regarding the śāstra and sūtra's explanation of obtaining the joy and bliss born of separation: "'Separation' means having already obtained the manaskāra of culminating praxis; 'born' means that it is immediately born taking this as cause and taking this as condition; 'joy and bliss' means having already obtained the sought-after purpose": this is stated in terms of a person of sharp faculties whose ninth path of liberation enters the fundamental dhyāna, hence it says they generate joy and bliss. If it is a person of dull faculties, their ninth path of liberation resides in the preparatory concentration, and only afterward can they enter the fundamental stage and generate joy and bliss.