Shiva Purana
मंत्राध्वनि न गण्येत तथासौ मंत्रनायकः ॥ कलाध्वनो व्यापकत्वं व्याप्यत्वं चेतराध्वनाम् ॥ ८ ॥
He should not be counted in the sound of the mantra, and so he is the leader of the mantra. The path of art is pervasive and the paths of others are pervasive.
english translation
maMtrAdhvani na gaNyeta tathAsau maMtranAyakaH ॥ kalAdhvano vyApakatvaM vyApyatvaM cetarAdhvanAm ॥ 8 ॥
hk transliteration by Sanscript