大般涅槃經義記 3.362

3.362

In the second part, 'wishing to cause the Tathāgata, for the sake of the bodhisattvas,' and so forth, explains his intention in asking: the true-nature Three Refuges are an extraordinary matter, and the teaching that can express them is named the vaipulya sūtras; he made the inquiry in order to cause the Tathāgata to differentiate this extraordinary matter and extol the vaipulya. From 'the Tathāgata's compassion' onward, he rejoices in receiving the Buddha's answer.