Natyashastra
भुजांसकूर्पराग्रैस्तु कुटिलावर्तितौ करौ । पराङ्गमुखतलाविद्धौ ज्ञेयावाविद्धवक्रकौ ॥ १९१॥
The two hands, with the upper parts of the arms and palms twisted in a curved shape, when turned obliquely and facing downwards, are known as Āviddhavakraka hands. These should be recognized accordingly.
english translation
bhujAMsakUrparAgraistu kuTilAvartitau karau । parAGgamukhatalAviddhau jJeyAvAviddhavakrakau ॥ 191॥
hk transliteration by Sanscript