Natyashastra
विवर्तनं कटाक्षस्तु समुद्वृत्तं समुन्नतिः । निष्क्रामो निर्गमः प्रोक्तः प्राकृतं तु स्वभावजम् ॥ १०१॥
Vivartana (turning)—turning the eyeballs sideways in a sidelong glance. Samudvṛtta (raising up)—raising up of the eyeballs. Niṣkramaṇa (going out)—going out ॥ as it were of the eyeballs.॥ Prākṛta (natural)—eyeballs in the natural (glance.)
english translation
vivartanaM kaTAkSastu samudvRttaM samunnatiH । niSkrAmo nirgamaH proktaH prAkRtaM tu svabhAvajam ॥ 101॥
hk transliteration by Sanscript