首楞嚴義疏注經 7.66

7.66

「若我說是佛頂光聚般怛囉呪，從旦至暮音聲相聯，字句中間亦不重疊，經恒沙劫終不能盡。」

"If I were to speak of the functions of this Buddha-Crest Light-Cluster Patrā mantra from morning till night, with the sounds unbroken and with no repetition of words or phrases, even after aeons as numerous as the sands of the Ganges, I would never reach the end."