Shiva Purana
सर्वज्ञस्सर्वकर्ता च शिवस्सर्वेश्वरोऽगुणः ॥ त्रिदेवजनको ब्रह्मा सच्चिदानन्दविग्रहः ॥ ४ ॥
The omniscient, omnipotent, Śiva, the Nirguṇa lord of all, the progenitor of the three deities, the Brahman, is formed of existence-knowledge-bliss.
english translation
sarvajJassarvakartA ca zivassarvezvaro'guNaH ॥ tridevajanako brahmA saccidAnandavigrahaH ॥ 4 ॥
hk transliteration by Sanscript