Shiva Purana
सच्चिदानदरूपत्वं वदति ब्रह्मणः श्रुतिः ॥ असन्निवर्त्तकः शब्दः सदात्मेति निगद्यते ॥ २५ ॥
The Śruti speaks of the Brahman as having the form of existence, knowledge and bliss. The word ‘existence’ is used in order to exclude the ‘non-existent’.
english translation
saccidAnadarUpatvaM vadati brahmaNaH zrutiH ॥ asannivarttakaH zabdaH sadAtmeti nigadyate ॥ 25 ॥
hk transliteration by Sanscript