Natyashastra
एष त्र्यस्रे कलापाते विकल्पोऽङ्गुलिभिः कृतः । कनिष्ठाङ्गुलिनिष्क्रामे प्रवेशश्च तथा भवेत् ॥ ४६॥
This is the variation of the three-beat measure performed with the fingers— The little finger moves out and also enters in.
english translation
eSa tryasre kalApAte vikalpo'GgulibhiH kRtaH । kaniSThAGguliniSkrAme pravezazca tathA bhavet ॥ 46॥
hk transliteration by Sanscript