Brahma Sutras
ॐ आकाशोऽर्थान्तरत्वादिव्यपदेशात् ॐ ॥ १-३-४१॥
Akasa (Space) is Brahman, because of the declaration of being something different and so on.
english translation
OM AkAzo'rthAntaratvAdivyapadezAt OM ॥ 1-3-41॥
hk transliteration by Sanscript