Natyashastra
नारदाद्याश्च गन्धर्वा गानयोगे नियोजिताः । एवं नाट्यमिदं सम्यग्बुद्ध्वा सर्वैः सुतैः सह ॥ ५१॥
The Gandharvas, including Nārada and others, were engaged in singing. Thus, after comprehending this dramatic art thoroughly, I, along with my sons, approached Brahmā.
english translation
nAradAdyAzca gandharvA gAnayoge niyojitAH । evaM nATyamidaM samyagbuddhvA sarvaiH sutaiH saha ॥ 51॥
hk transliteration by Sanscript