Shri Rudram

[3] Shri Rudram is also famous for its mention of the Shaivite holy mantra Namah Shivaya, which appears in the text of the Śatarudrīya in the eighth anuvāka of Taittiriya Samhita (TS 4.5.8.1).

There are some popular expiatory rites such as rudraikādaśinī, mahārudra and atirudra which employ the Shree Rudra mantra exclusively for pūjā japa and homa.

There are three major commentaries in Sanskrit for the Shree Rudra mantra (śatarudrīya) -those of Sāyaṇa Bhaṭṭabhāskara and Abhinavaśaṅkara.

Shri Rudram consists of two chapters (praśna) from the fourth kāṇda (book) of Taittiriya Samhita which is a part of Krishna Yajurveda.

[10] The Namakam (chapter five) in Shri Rudram describes the names or epithets of Rudra, who is a fear-inducing/destructive aspect of Shiva.