大般涅槃經義記 6.292

6.292

下總結歎，「密語不思」當相正歎，「佛、法、僧」等歎其所說成語不思。

Below, it concludes with praise: "Secret words are inconceivable" is direct praise in accordance with their characteristics; "Buddha, Dharma, Saṅgha," and so forth praise the words he has spoken as constituting inconceivable speech.