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.
दीर्घप्रणवमेवं हि योगिनामेव हृद्गतम् । मकारं तंत्रितत्त्वं हि ह्रस्वप्रणव उच्यते १४ ।
The long Pranava (Om) is indeed the one that resides in the heart of yogis. The 'M' sound (Makara) is the essence of the Tantric principle. The short Pranava is also called the 'Hrasva Pranava'.
शिवः शक्तिस्तयोरैक्यं मकारं तु त्रिकात्मकम् । ह्रस्वमेवं हि जाप्यं स्यात्सर्वपापक्षयैषिणाम् १५ ।
Śiva, Śakti and their union are indicated by “M” syllable ramified into three and this is called the short subtle Praṇava. The short Praṇava shall be recited and repeated by those who desire their all sins annihilated.