उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
राजप्रतिग्रहो घोरो बुद्ध्वा चादौ विषोपमः बुधेन परिहर्तव्यः श्वमांसं चापि वर्जयेत्
rājapratigraho ghoro buddhvā cādau viṣopamaḥ budhena parihartavyaḥ śvamāṃsaṃ cāpi varjayet
Принятие даров от царя страшно: знай, что с самого начала это подобно яду. Потому разумный искатель должен избегать такого принятия; и также воздерживаться от собачьего мяса.
Suta Goswami (narrating traditional dharma injunctions to the sages at Naimisharanya)
It stresses the inner purity (shaucha) and non-dependence (vairagya) required for Shiva-puja: a worshipper should avoid contaminating influences like compromising gifts and impure food, so devotion remains sattvic and fit for approaching Pati (Shiva).
Indirectly, it implies Shiva-tattva as supremely pure and liberating: because Pati is stainless, the pashu (bound soul) must reduce pasha (bondage) such as greed, obligation, and impurity that arise from dangerous patronage and tamasic diet.
Yama-niyama–like restraints supporting Shaiva sadhana: refusal of ethically risky donations and avoidance of impure foods, which stabilize the mind for mantra, puja, and Pashupata-oriented discipline.