Natyashastra
चारया चानया भ्रान्त्वा पर्यायेणाथ मण्डलम् । समोत्सरितमेतत्तु कार्यं व्यायाममण्डलम् ॥ ५५॥
By moving in a circular manner with a rotating motion, one should form the circle step by step. This is the prescribed method for performing the exercise or battle circle.
english translation
cArayA cAnayA bhrAntvA paryAyeNAtha maNDalam । samotsaritametattu kAryaM vyAyAmamaNDalam ॥ 55॥
hk transliteration by Sanscript