大般涅槃經義記 6.91

6.91

自下第二次明有得。於中，初先略明有得，「如文殊等詎有幾」下廣明有得。前中，迦葉先舉上偈請問如來，以此偈中備含得義故舉請佛。下佛答之，先明此偈普為一切，彰一切人悉有所得。「時文殊」下彰彼文殊先已解知，不須更說。

From here below, the second part explains that there is attainment. Within this, first it briefly explains that there is attainment; from "how many people could there be like Mañjuśrī?" onward, it extensively explains that there is attainment. In the former part, Kāśyapa first cites the verse above to inquire of the Tathāgata, doing so because this verse fully contains the meaning of attainment. Below, the Buddha answers him, first explaining that this verse is universally for all beings, demonstrating that all persons have attainment. From "at that time Mañjuśrī" onward, it demonstrates that Mañjuśrī had already understood and known this beforehand, so there was no need to speak further.