請觀音經疏闡義鈔 4.28

4.28

Regarding "Upasena hearing below" and so forth: this belongs to the third section, explaining the interlocking text and meaning of the six sense faculties and the six characters; therefore it is divided into two headings. The sūtra states, "At that time, when Upasena heard these words, his body became like water and fire" and so forth, which eliminates the śrāvakas. "Contemplating ignorance, volitional formations" and so forth eliminates the pratyekabuddhas. "Or entering serene samādhi" and so forth eliminates the bodhisattvas. Therefore it is said to eliminate the six gates of the practitioners of the three vehicles.