Brahma Sutras
ॐ गतिशब्दाभ्यां तथा हि दृष्टं लिङ्गं च ॐ ॥ १-३-१५॥
From the facts of going and the use of the word (Brahma-loka), (it follows that the small Space is Brahman); likewise it is seen in other Upanishads and an indicatory mark is also present.
english translation
OM gatizabdAbhyAM tathA hi dRSTaM liGgaM ca OM ॥ 1-3-15॥
hk transliteration by Sanscript