उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
किंचित् कर्णान्तरं विद्याद् उपांशुः स जपः स्मृतः मानसजप धिया यदक्षरश्रेण्या वर्णाद्वर्णं पदात्पदम्
kiṃcit karṇāntaraṃ vidyād upāṃśuḥ sa japaḥ smṛtaḥ mānasajapa dhiyā yadakṣaraśreṇyā varṇādvarṇaṃ padātpadam
Bila japa dilakukan sangat lirih hingga terdengar hanya dalam ruang telinga sendiri, itu disebut upāṁśu-japa (berbisik). Namun bila dengan daya budi saja mantra diulang sebagai rangkaian suku kata—huruf demi huruf dan kata demi kata—itulah mānasa-japa (batin).
Suta (narrating the teaching on japa to the sages of Naimiṣāraṇya)
It defines two authoritative modes of Shiva-mantra japa—murmured (upāṁśu) and purely mental (mānasa)—showing how Linga-pūjā is perfected by increasingly internalized recitation.
By valuing mānasa-japa—recitation carried by pure awareness—it points to Shiva as Pati who is approached inwardly: the paśu turns from external sound to inner consciousness, loosening pāśa through disciplined attention.
Mantra-japa as a graded sādhanā: upāṁśu (barely audible) leading toward mānasa-japa (letter-by-letter mental repetition), a key Pāśupata-style interiorization supporting dhyāna and pūjā.