षट्त्रिंशत्कोटिजापी तु निश्चयं योगमाप्नुयात् । सूक्ष्मं च द्विविधं ज्ञेयं ह्रस्वदीर्घविभेदतः १२ ।
A person who repeats the mantra thirty-six crores of times certainly attains the yogic communion. The subtle Praṇava is again two-fold—the short, and the long.