Natyashastra
अनामिकाकनीयस्योर्निष्क्रामश्च पुनस्ततः। ताभ्यामेव हि विक्षेपः शम्या चावाप एव च ॥ १६८॥
After the movement (Niṣkrāma) of the ring and little fingers, the Vikṣepa (throwing or outward movement) is to be performed with these two fingers alone, along with the Śamyā and Āvāpa movements.
english translation
anAmikAkanIyasyorniSkrAmazca punastataH। tAbhyAmeva hi vikSepaH zamyA cAvApa eva ca ॥ 168॥
hk transliteration by Sanscript