法苑珠林 60.14

60.14

此阿彌陀呪若欲誦者。諸口傍字皆依本音轉。言之無口者依字讀。仍須師授之。聲韻合梵輕重得法。依之修行剋有靈驗。

If one wishes to recite this Amida mantra: all characters with the mouth radical are altered according to their original pronunciation; those without the mouth radical are read according to the character. It must still be conferred by a master. The sound and meter should conform to Sanskrit, with light and heavy accents correctly applied; if one cultivates according to this, it is certain to yield efficacy.