One verse

Srimad Bhagavatam 3.26.33

3.26.33

अर्थाश्रयत्वं शब्दस्य द्रष्टुर्लिङ्गत्वमेव च । तन्मात्रत्वं च नभसो लक्षणं कवयो विदु: ॥ ३३ ॥

arthasrayatvam sabdasya drastur lingatvam eva ca tan-matratvam ca nabhaso laksanam kavayo viduh

artha-asrayatvam
that which conveys the meaning of an object
sabdasya
of sound
drastuh
of the speaker
lingatvam
that which indicates the presence
eva
also
ca
and
tat-matratvam
the subtle element
ca
and
nabhasah
of ether
laksanam
definition
kavayah
learned persons
viduh
know.

Persons who are learned and who have true knowledge define sound as that which conveys the idea of an object, indicates the presence of a speaker screened from our view and constitutes the subtle form of ether.