Natyashastra
तस्य दक्षिणतः क्षेपो विक्षेप इति सञ्ज्ञितः । निवर्तनं च हस्तस्य प्रवेशोऽधोमुखस्य तु ॥ ३४॥
The swift movement of the downward-turned hand to the right side is called Vikṣepa. The drawing back or inward turning of the downward-facing hand is known as Praveśa.
english translation
tasya dakSiNataH kSepo vikSepa iti saJjJitaH । nivartanaM ca hastasya pravezo'dhomukhasya tu ॥ 34॥
hk transliteration by Sanscript