Natyashastra
शस्त्रखेटकयोश्चापि भ्रमणं संविधीयते । शिरः परिगमस्तद्वच्छस्त्रस्येह भवेत्तथा ॥ ८३॥
The circling of the weapon and the shield is also prescribed. Similarly, the weapon should be moved around the head in this method.
english translation
zastrakheTakayozcApi bhramaNaM saMvidhIyate । ziraH parigamastadvacchastrasyeha bhavettathA ॥ 83॥
hk transliteration by Sanscript