Dvitīyopadeśaḥ (Prāṇāyāma) · Verse 21

प्रातर्मध्यन्दिने सायमर्धरात्रे च कुम्भकान् | शनैः अशीतिपर्यन्तं चतुर्वारं समभ्यसेत्

prātar madhyandine sāyam ardharātre ca kumbhakān | śanaiḥ aśītiparyantaṃ caturvāraṃ samabhyaset

In the morning, at midday, in the evening, and at midnight, one should practice kumbhakas four times, gradually up to eighty.

This verse prescribes the practice schedule: the four sandhyās or junctures of the day. Prātar (dawn, approximately 6 AM), madhyandina (noon), sāyam (sunset), and ardharātra (midnight) are considered auspicious moments when cosmic energies facilitate practice.

The number eighty (aśīti) indicates the goal toward which the practitioner should advance gradually. This does not mean the beginner should start with 80 kumbhakas; rather, it is the objective reached after years of systematic practice.

Four daily sessions (caturvāram) may seem demanding for the modern practitioner. Commentators suggest that even two sessions (morning and evening) produce significant benefits. However, the classical text presents the traditional ideal for those completely dedicated to the practice of yoga.