Natyashastra
कनिष्ठानामिकास्थाने तालो ज्ञेयस्तृतीयके । शम्यापातश्चतुर्थी स्यान्निष्क्रामो मध्यमाकृतः ॥ ४७॥
In the third beat, the beat is to be made at the place of the little and ring fingers; In the fourth, the staff is struck down, and in the fifth, the middle finger is moved out.
english translation
kaniSThAnAmikAsthAne tAlo jJeyastRtIyake । zamyApAtazcaturthI syAnniSkrAmo madhyamAkRtaH ॥ 47॥
hk transliteration by Sanscript