Natyashastra
बाह्यभ्रमरकं चैव रङ्गकोणे प्रसारयेत् । त्रिकं सुललितं कृत्वा लताख्यं हस्तमेव च ॥ १३०॥
Then he should extend the outward Bhramara Maṇḍala towards a corner of the stage, gracefully twist the waist (Trika), and display the hand gesture called Latā.
english translation
bAhyabhramarakaM caiva raGgakoNe prasArayet । trikaM sulalitaM kRtvA latAkhyaM hastameva ca ॥ 130॥
hk transliteration by Sanscript