Hanumān-mantra-kathana: Mantra-bheda, Nyāsa, Yantra, and Prayoga
आद्यवर्णैः पूरकं स्यात्पञ्चवर्गैश्च कुम्भकम् । रेचकं च पुनर्याद्यैरेवं प्राणान्नियन्य च ॥ १५३ ॥
ādyavarṇaiḥ pūrakaṃ syātpañcavargaiśca kumbhakam | recakaṃ ca punaryādyairevaṃ prāṇānniyanya ca || 153 ||
ការដកដង្ហើមចូល (pūraka) គួរធ្វើដោយអក្សរដំបូងៗ; ការកាន់ដង្ហើម (kumbhaka) ដោយក្រុមអក្សរទាំងប្រាំ; ហើយការដកដង្ហើមចេញ (recaka) ម្តងទៀតដោយអក្សរដំបូងៗ—ដូច្នេះហើយ គ្រប់គ្រង និងទប់ស្កាត់ព្រះព្រាណ (prāṇa)។
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhakti
It links prāṇāyāma to sacred sound (varṇa), teaching that breath regulation becomes more focused and purifying when coordinated with mantra/phonetic structure.
By disciplining prāṇa through mantra-like letter sequences, the mind becomes steady and fit for sustained remembrance and worship, which supports bhakti as concentrated attention on the divine.
Śikṣā (Vedic phonetics): it uses the organization of Sanskrit letters (initial sounds and the five vargas) as a technical method to time pūraka–kumbhaka–recaka in practice.