Natyashastra
विज्ञेयं शकटास्यं तु व्यायामे युद्धमण्डलम् । पादैश्च शकटास्यस्थैः पर्यायेणाथ मण्डलम् ॥ ६२॥
The 'Shakatāsya' movement should be recognized as a part of the exercise and combat circle. It is performed in the same manner with the feet placed in the 'Shakatāsya' position, following the circular pattern in a sequence.
english translation
vijJeyaM zakaTAsyaM tu vyAyAme yuddhamaNDalam । pAdaizca zakaTAsyasthaiH paryAyeNAtha maNDalam ॥ 62॥
hk transliteration by Sanscript