Natyashastra
उत्क्षिप्तवक्रा तु यदानामिका सकनीयसी । अस्यैव तु कपित्थस्य तदासो खटकामुखः ॥ ६१॥
When the ring finger and the little finger of the Kapittha hand are raised and bent, it is called Kaṭakāmukha.
english translation
utkSiptavakrA tu yadAnAmikA sakanIyasI । asyaiva tu kapitthasya tadAso khaTakAmukhaH ॥ 61॥
hk transliteration by Sanscript