Natyashastra
कनिष्ठाङ्गुलिनिष्क्रामः प्रथमे तु कले भवेत् । शम्यापातो द्वितीया च तृतीया ताल एव च ॥ ४४॥
In the first Kalā, the little finger (kaniṣṭhāṅguli) should move out (niṣkrāma); the second is the dropping (āpāta) of the rod (śamya); and the third is the beat (tāla) itself.
english translation
kaniSThAGguliniSkrAmaH prathame tu kale bhavet । zamyApAto dvitIyA ca tRtIyA tAla eva ca ॥ 44॥
hk transliteration by Sanscript