उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
मिथ्या न कारयेद्देवि क्रियया च गुरोः सदा दुर्गुणे ख्यापिते तस्य नैर्गुण्यशतभाग्भवेत्
mithyā na kārayeddevi kriyayā ca guroḥ sadā durguṇe khyāpite tasya nairguṇyaśatabhāgbhavet
噢女神(Devi),切莫以任何矫饰之行,捏造关于上师(Guru)的虚妄。若宣扬上师所谓的过失,便将百倍承受同样的罪垢,使不净与缚索(pāśa)更为加重。
Suta Goswami (narrating the Purana; verse framed as a Devi-address within the teaching)
It establishes inner purity as a prerequisite for Shiva-puja: slandering or inventing faults about one’s Guru creates heavy demerit, obstructing mantra-siddhi and the fruit of Linga worship.
By implication, Shiva-tattva is accessed through disciplined truthfulness and reverence toward the Guru, who functions as the channel of Śiva’s grace (anugraha) that cuts pasha for the pashu.
The discipline of guru-sevā and vāg-niyama (restraint of speech) is emphasized as part of Shaiva sādhanā—supporting Pashupata practice by preventing karmic accrual through nindā (censure).