Natyashastra
एवं प्रयोगे प्रारब्धे दैत्यदानवनाशने । अभवन्क्षुभिताः सर्वे दैत्या ये तत्र सङ्गताः ॥ ६४॥
Thus, when the performance commenced for the destruction of the demons and Danavas, all the demons present there became agitated.
english translation
evaM prayoge prArabdhe daityadAnavanAzane । abhavankSubhitAH sarve daityA ye tatra saGgatAH ॥ 64॥
hk transliteration by Sanscript