Aghora-Mantra Japa: Graded Expiations, Pañcagavya Purification, and Homa for Mahāpātaka-Nivṛtti
उपांशु यच्चतुर्धा वै वाचिकं चाष्टधा जपेत् पातकादर्धमेव स्याद् उपपातकिनां स्मृतम्
upāṃśu yaccaturdhā vai vācikaṃ cāṣṭadhā japet pātakādardhameva syād upapātakināṃ smṛtam
应以低声(upāṁśu)诵念真言四遍,又以高声(vācika)诵念八遍。经中教示:背负次罪(upapātaka)者,其所得功德仅为重罪(pātaka)之情形的一半。
Suta Goswami (narrating traditional injunctions within the Linga Purana discourse to the sages of Naimisharanya)
It gives a practical rule for mantra-japa used in Shiva-puja, distinguishing low-voiced and aloud recitation as measurable disciplines supporting purification before (and during) Linga worship.
By framing japa as a means to lessen sin and bondage, it implies Shiva as Pati—the liberating Lord—approached through mantra, which refines the pashu (soul) and loosens pasha (impurity/bondage).
Mantra-japa discipline: upāṁśu-japa (low-voiced) and vācika-japa (aloud), prescribed in specific multiples as part of Shaiva purification and preparatory practice aligned with Pashupata-oriented sadhana.