Natyashastra
उत्तरोत्तरसञ्जल्पो रोषामर्षकृतस्तु यः । मल्लानाञ्चैव सम्फेटः शत्रूणां च निरूपणम् ॥ ६९॥
This posture is also to be used in increasing verbal exchanges, born of anger and indignation, in wrestling combats, and in the depiction of enemies.
english translation
uttarottarasaJjalpo roSAmarSakRtastu yaH । mallAnAJcaiva sampheTaH zatrUNAM ca nirUpaNam ॥ 69॥
hk transliteration by Sanscript