Dhyana mantras for Yoga Nidra (yogic sleep) are meditative formulas designed to induce the state of conscious deep relaxation between wakefulness and sleep. The practice is rooted in the Tantric and Yogic traditions, where Nidra is personified as the goddess Yoganidra, a form of Devi associated with Vishnu's cosmic sleep. The earliest textual reference to Yoganidra appears in the Devi Mahatmya (ca. 5th–6th century CE), where the goddess is described as the sleep of Vishnu (Devi Mahatmya 1.74-75).
The mantras often incorporate the bija (seed) syllable 'HRIM', which is associated with the goddess and the element of akasha (space), facilitating the expansion of consciousness. Another common bija is 'AIM', linked to Saraswati and knowledge, used for mental clarity during the practice. The phonetics of these syllables—'H' representing the prana, 'R' the fire element, 'I' the will, and 'M' the nasal resonance—are believed to calm the nervous system and guide the mind into a state of witness consciousness (sakshi bhava). According to the Mantra Mahodadhi (19th century), such dhyana mantras are chanted mentally or softly before sleep to purify the subconscious and integrate spiritual impressions.
The traditional purpose includes deep rest, release of samskaras (latent impressions), and preparation for higher meditative states. Recommended chanting context: 108 repetitions (one mala) in a quiet, dark room, preferably at bedtime or during a guided Yoga Nidra session. The practitioner should lie in shavasana (corpse pose) and focus on the breath or the space between thoughts. Cautions: those with severe insomnia or mental disorders should practice under guidance, as the deep relaxation may surface suppressed emotions.
The Yoga Sutras of Patanjali (1.38) also allude to the practice of 'nidra' as a means to stabilize the mind, though the specific mantra tradition is elaborated in later Tantric texts like the Shaktisangama Tantra, which describes Yoganidra as the supreme goddess who dissolves duality. Thus, the Yoga Nidra Dhyana Mantra serves as a tool for conscious rest, aligning the practitioner with the primordial state of undifferentiated awareness.
Salutations to the goddess Yoganidra (the sleep of yoga).
The mantra may incorporate the seed syllable 'HRĪṂ' (ह्रीं) which is associated with the goddess and the element of space (ākāśa), facilitating expansion of consciousness. 'HRĪṂ' consists of H (prāṇa), R (fire), Ī (will), and Ṃ (nasal resonance), calming the nervous system.