Shiva Purana
देव्युवाच ॥ अद्वितीयो महेशानः परब्रह्म सदाशिवः ॥ यत्तत्त्वन्न विदुर्वेदा विष्ण्वादीनां च का कथा ॥ ५९ ॥
Lord Śiva, the great Braḥman, the eternal god is without a second. Even the Vedas do not understand his reality. What then of Viṣṇu and others?
english translation
devyuvAca ॥ advitIyo mahezAnaH parabrahma sadAzivaH ॥ yattattvanna vidurvedA viSNvAdInAM ca kA kathA ॥ 59 ॥
hk transliteration by Sanscript