Shiva Purana
उपमन्युरुवाच ॥ पञ्चाक्षरस्य माहात्म्यं वर्षकोटिशतैरपि ॥ अशक्यं विस्तराद्वक्तुं तस्मात्संक्षेपतः शृणु ॥ २ ॥
Upamanyu said:— It is impossible to explain in detail the glory of the five-syllabled mantra even in hundreds of crores of years. Hence hear it in brief.
english translation
upamanyuruvAca ॥ paJcAkSarasya mAhAtmyaM varSakoTizatairapi ॥ azakyaM vistarAdvaktuM tasmAtsaMkSepataH zRNu ॥ 2 ॥
hk transliteration by Sanscript