Natyashastra
चतुर्थः परिवर्तस्तु कार्यो द्रुतलये पुनः । करपादनिपातास्तु भव्न्त्यत्र तु षोडश ॥ ८५॥
The fourth part should be performed again with a quick tempo. Here, there are sixteen movements involving the fall of hands and feet.
english translation
caturthaH parivartastu kAryo drutalaye punaH । karapAdanipAtAstu bhavntyatra tu SoDaza ॥ 85॥
hk transliteration by Sanscript