The Exposition of the Krishna Mantra (Kṛṣṇa-mantra-prakāśa): Nyāsa, Dhyāna, Worship, Yantra, and Prayoga
दशाक्षरेण चेद्रात्रौ सायाह्नेऽष्टादशार्णतः । उभयीमुभयेनैव कुर्यादित्यपरे जगुः ॥ ९१ ॥
daśākṣareṇa cedrātrau sāyāhne'ṣṭādaśārṇataḥ | ubhayīmubhayenaiva kuryādityapare jaguḥ || 91 ||
หากประกอบพิธีในยามราตรี พึงทำด้วยมนต์สิบพยางค์; ครั้นยามสนธยาเย็น พึงทำด้วยมนต์สิบแปดพยางค์. บางท่านกล่าวว่า พิธีที่ให้ผลทั้งสองควรกระทำโดยสวดมนต์ทั้งสองร่วมกัน.
Narada (teaching as part of technical ritual guidance; traditional dialogue context with Sanatkumara lineage)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhakti
It teaches that mantra practice is strengthened when aligned with proper time (kāla), prescribing different mantras for night and evening twilight, and even allowing a combined practice for a fuller, “twofold” spiritual outcome.
By regulating japa with specific Vishnu-oriented mantras according to sacred times (night and sāyaṃ-sandhyā), it frames devotion as disciplined, time-conscious worship rather than casual repetition.
It reflects procedural ritual science—kāla-vicāra (time-determination) and sandhyā-related practice—showing how correct timing governs mantra choice and the expected fruit of the rite.