法華玄論 7.78

7.78

答：不爾。此是八種音中清淨最妙音名為梵音，非梵天音也。故《釋論》云「佛生人中受人法故是人音，又若是梵天音者人則不聞。」故知非也。

Answer: It is not so. Among the eight kinds of voices, this pure and most wonderful voice is called the Brahmā voice; it is not the voice of the Brahmā devas. Thus the Explanatory Treatise says: 'Because the Buddha was born among humans and received human dharmas, it is a human voice; furthermore, if it were the voice of Brahmā devas, humans would not hear it.' Hence we know it is not so.