Natyashastra
सुकुमारप्रयोगश्च शृङ्गाररससम्भवः । तस्य तण्डुप्रयुक्तस्य ताण्डवस्य विधिक्रियाम्॥२६९॥
The delicate form of the dance, which arises from the erotic sentiment, is the method of Tāṇḍava, as performed by Taṇḍu. This is the way the dance is executed.
english translation
sukumAraprayogazca zaRGgArarasasambhavaH । tasya taNDuprayuktasya tANDavasya vidhikriyAm॥269॥
hk transliteration by Sanscript