Natyashastra
एकीभूताः पुनस्त्वेता नाटकादौ भवन्ति हि । अवेक्ष्य वृत्तिबाहुल्यं तत्तत्कर्म समाचरेत् ॥ ५६॥
These activities, once unified, are applied at the beginning of a drama. Observing the predominance of specific modes, one should execute the corresponding actions accordingly.
english translation
ekIbhUtAH punastvetA nATakAdau bhavanti hi । avekSya vRttibAhulyaM tattatkarma samAcaret ॥ 56॥
hk transliteration by Sanscript