Shiva Purana
शिवशक्त्योस्तु संयोगादानन्दः सततोदितः ॥ ब्रह्मेति शिवशक्त्योस्तु सर्वात्मत्वमिति स्फुटम् ॥ ३ ॥
Bliss is ever-rising due to the union of Śiva and Śakti. The word Brahman indicates the state of being Ātman of all, of Śiva and Śakti.
english translation
zivazaktyostu saMyogAdAnandaH satatoditaH ॥ brahmeti zivazaktyostu sarvAtmatvamiti sphuTam ॥ 3 ॥
hk transliteration by Sanscript