成唯識論述記 5.798

5.798

此立宗義同外門轉，第一因也。定中聞聲非我所許，三性俱起，設縱許者，定心可然，散位無故，非五識中三性俱轉。

This establishes the thesis that they operate toward external gates alike, which is the first reason. Hearing sounds in meditative absorption is not accepted by our school as the three natures arising together; even if it were granted, it might be so for a mind in absorption, but because it does not exist in a distracted state, the three natures do not operate together among the five consciousnesses.