Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 32

Sanskrit:

तामसो भूतसूक्ष्मादिर्यत: खं लिङ्गमात्मन: ॥ ३२ ॥

ITRANS:

tāmaso bhūta-sūkṣmādiryataḥ khaṁ liṅgam ātmanaḥ

Translation:

The sky is a product of sound, and sound is the transformation of egoistic ignorance. In other words, the sky is the symbolic representation of the Supreme Soul.

Purport:

In the Vedic hymns it is said, etasmād ātmanaḥ ākāśaḥ sambhūtaḥ. The sky is the symbolic representation of the Supreme Soul. Those who are egoistic in passion and ignorance cannot conceive of the Personality of Godhead. For them the sky is the symbolic representation of the Supreme Soul.