金剛般若波羅蜜經註解 1.149

1.149

Subhūti, having heard that upholding the sūtra accomplishes a rare dharma, therefore asked: "What is this sūtra called? How should we receive and uphold it?" The Buddha answered: "This sūtra is named 'Vajra Prajñā', because it can sever all doubts and attachments; thus you should receive and uphold it." Although the wisdom of prajñā is used to sever attachments, yet the dharma-nature is fundamentally empty and cannot be grasped at; therefore he said: "is not prajñāpāramitā."