Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 32

Sanskrit:

नम: शिवाय रुद्राय नम: शक्तिधराय च ।सर्वविद्याधिपतये भूतानां पतये नम: ॥ ३२ ॥

ITRANS:

namaḥ śivāya rudrāyanamaḥ śakti-dharāya casarva-vidyādhipatayebhūtānāṁ pataye namaḥ

Translation:

I offer my respectful obeisances unto You, Lord Śiva, or Rudra, who are the reservoir of all potencies, the reservoir of all knowledge, and the master of everyone.

Purport:

It is the system for one to offer obeisances unto the expansion or incarnation of the Lord. Lord Śiva is the incarnation of ignorance, one of the material modes of nature.