Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
शिरः प्रावृत्य कुर्वीत अन्तर्धाय तृणैर्महीम् / एवं यो वर्तते भूमौ शर्वस्तं न हिनस्ति वै
śiraḥ prāvṛtya kurvīta antardhāya tṛṇairmahīm / evaṃ yo vartate bhūmau śarvastaṃ na hinasti vai
Covering the head and concealing the ground with grass, one should do so discreetly. Whoever behaves thus upon the Earth, Śarva indeed does not harm that person.