Natyashastra
प्रयोगवशगौ हस्तावूर्ध्वजानु प्रकीर्तितम् । वृश्चिकं चरणं कृत्वा करं पार्श्वे निकुञ्चयेत् ॥ ८६॥
Ūrdhvajānu—a Kuñcita foot to be thrown up, and the knee to be held up (lit. stretched) on a level with the chest, and the two hands to be in harmony with the dance.
english translation
prayogavazagau hastAvUrdhvajAnu prakIrtitam । vRzcikaM caraNaM kRtvA karaM pArzve nikuJcayet ॥ 86॥
hk transliteration by Sanscript