一切經音義 2.71

2.71

次音梵文（此經有三十二梵字有與梵音輕重訛舛不同者蓋為此國文字難為敵對自通達梵漢兩國文字兼善聲韻音方能審之耳今以雙聲疊韻反之即與梵音乖失不為切音也讀者悉之也）。

Next, pronunciations of Sanskrit text (In this sūtra there are thirty-two Sanskrit syllables. Those whose sounds differ in weight or are corruptly inaccurate compared to Sanskrit pronunciation are so because the characters of this land can hardly match them exactly. Only one who has thoroughly mastered the writing systems of both Sanskrit and Han lands, and is also skilled in phonology, can examine them accurately. Now, if one uses alliteration and rhyming fanqie to read them, they will diverge from the Sanskrit pronunciation and not form an accurate phonetic spelling. Readers should know this).