Shiva Purana
श्रुतिराह मुने सा हि साक्षाच्छिवमुखोद्गता ॥ सर्वात्मा परमैरेभिर्गुणैर्नित्यसमन्वयात् ॥ २८ ॥
O sage, the Śruti says that it has originated from Śiva’s mouth. “I am the soul of all”, because the great qualities are ever present in me.
english translation
zrutirAha mune sA hi sAkSAcchivamukhodgatA ॥ sarvAtmA paramairebhirguNairnityasamanvayAt ॥ 28 ॥
hk transliteration by Sanscript