Shiva Purana
पुनश्च पंचलक्षेण मंत्रक्षत्त्रिय उच्यते । पुनश्च पंचलक्षेण क्षत्त्रत्वमपनेष्यति १२६ ।
Then he becomes a mantra-Kṣatriya by repeating it five hundred thousand times. He then dispels the Kṣatratva by five hundred thousand japas.
english translation
punazca paMcalakSeNa maMtrakSattriya ucyate । punazca paMcalakSeNa kSattratvamapaneSyati 126 ।
hk transliteration by Sanscript