Natyashastra
कुञ्चितावञ्चितौअ चैव ह्यूरूद्वृत्तं तथैव च । चतुरश्रं करं कृत्वा पादेन च निकुट्टकम् ॥ १८८॥
The knees are bent and turned aside, and the thighs are raised. The hand should be shaped squarely, and with the foot, the Nikuṭṭaka should be performed.
english translation
kuJcitAvaJcitaua caiva hyUrUdvRttaM tathaiva ca । caturazraM karaM kRtvA pAdena ca nikuTTakam ॥ 188॥
hk transliteration by Sanscript