Shiva Purana
एवमष्टोत्तरशतकोटिजप्तेन वै पुनः । प्रणवेन प्रबुद्धस्तु शुद्धयोगमवाप्नुयात् २३ ।
A devotee who thus completes one hundered and eight crores of Japas of Praṇava (Om) and is thus fully enlightened shall master Śuddhayoga.
english translation
evamaSTottarazatakoTijaptena vai punaH । praNavena prabuddhastu zuddhayogamavApnuyAt 23 ।
hk transliteration by Sanscript