俱舍論記 10.124

10.124

「見色等已至根境定故」者，恐執經文眼見色已於順喜色起喜近行等，便謂見色已於順喜聲起喜近行等非近行攝。為明總攝，故有此文。見色等已於聲等中起喜、憂、捨，亦是意近行。恐難違經，逆為通釋。隨無雜亂，是故經中作如是說見已等言，於中建立根、境定故。謂色等境，眼根見等及意了故。

"Having seen forms, etc.... because faculties and objects are fixed": this is written because of the concern that, clinging to the sūtra words "having seen a form with the eye, one gives rise to an exploration of gladness toward forms that accord with gladness," and so forth, one might think that after seeing a form, giving rise to an exploration of gladness toward sounds that accord with gladness is not included within mental exploration. To make clear that it includes them comprehensively, there is this text. After seeing a form and the like, to give rise to gladness, grief, or equanimity toward sounds and the like is also a mental exploration. Fearing the objection that this contradicts the sūtra, the text resolves it in advance: it is to avoid confusion that the sūtra spoke in this way, with words such as "having seen," because within it, faculties and objects are established definitively. That is, objects such as form are seen by the eye faculty and comprehended by the mind.