Matsya Purana — Brahmā’s Four Faces
मनः सृष्टिं विकुरुते चोद्यमानं सिसृक्षया आकाशं शब्दतन्मात्राद् अभूच् छब्दगुणात्मकम् //
manaḥ sṛṣṭiṃ vikurute codyamānaṃ sisṛkṣayā ākāśaṃ śabdatanmātrād abhūc chabdaguṇātmakam //
Urged by the will to create, the mind sets creation in motion; from the subtle essence of sound (śabda-tanmātra) arose ākāśa (ether), whose defining quality is sound.
It describes the forward creation sequence (sarga): when creation begins, mind-driven intention leads to the manifestation of ether from the sound-tanmātra, establishing sound as ether’s defining property.
Indirectly, it grounds dharma in cosmic order: as creation proceeds by orderly principles (cause → subtle essence → gross element), a king or householder is likewise expected to act with disciplined intention and structured governance/household management rather than impulse.
Ākāśa (space) and śabda (sound) underpin ritual acoustics—mantra and recitation—and, by extension, temple planning that preserves resonant spaces; the verse supplies the cosmological basis for why sound is central in worship and sacred architecture.