Natyashastra
हस्तौ निपतितौ चोर्वोर्वर्तितं करणं तु तत् । शुकतुण्डौ यदा हस्तौ व्यावृत्तपरिवर्तितौ ॥ ६३॥
When the hands drop to the thighs, it is known as the Vartita Karaṇa. When the hands, in the Śukatuṇḍa gesture, perform Vyāvṛtta and Parivartita, it constitutes this movement.
english translation
hastau nipatitau corvorvartitaM karaNaM tu tat । zukatuNDau yadA hastau vyAvRttaparivartitau ॥ 63॥
hk transliteration by Sanscript