淨名經集解關中疏 2.424

2.424

"Beseeching [the Buddhas] to preach the Dharma, rejoicing in and praising the good, they attain the Buddha's voice, the goodness of body, speech, and mind, and attain the Buddha's deportment." These are the virtues of the mahāsattva. The Buddha's voice refers, as the sūtra says, to the eight tones of voice: first, penetrating and beautiful; second, soft and pliable; third, harmonious and fitting; fourth, clear and distinct; fifth, not feminine; sixth, not erroneous; seventh, deep and far-reaching; eighth, inexhaustible. Furthermore, the Guhyakādhipati-sūtra says it has limitless tones of voice.