Natyashastra
भ्रुकुटिकुटिलोत्कटमुखैः सेर्ष्याक्रोधपरिवृत्तनेत्रैश्च । गुणनाशनविद्वेषैस्तत्राभिनयः प्रयोक्तव्यः ॥ ३७॥
It is to be represented by a distorted face, knitting eyebrows, face turned away in jealous anger, decrying other people’s virtues and showing hatred towards them.
english translation
bhrukuTikuTilotkaTamukhaiH serSyAkrodhaparivRttanetraizca । guNanAzanavidveSaistatrAbhinayaH prayoktavyaH ॥ 37॥
hk transliteration by Sanscript