Natyashastra
पूर्वरङ्गः कृतः पूर्वं तत्रायं द्विजसत्तमाः । तथा त्रिपुरदाहश्च डिमसंज्ञः प्रयोजितः ॥ १०॥
The preliminaries were performed first, and there the great Brahmin, along with the performance of the Tripuradāha, a dramatic piece known as Ḍīma, was also initiated.
english translation
pUrvaraGgaH kRtaH pUrvaM tatrAyaM dvijasattamAH । tathA tripuradAhazca DimasaMjJaH prayojitaH ॥ 10॥
hk transliteration by Sanscript