Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
यज्ञैर्व्यवहरन्त्येनं ये वै परिचरन्ति च / एवं युक्तं महेशानो नैव देवो हिनस्ति तम्
yajñairvyavaharantyenaṃ ye vai paricaranti ca / evaṃ yuktaṃ maheśāno naiva devo hinasti tam
Those who approach him through yajñas and attend upon him in service—one thus united, by Maheśāna’s grace, is harmed by no deity.