Natyashastra
उदत्तगमने चैव वर्तितोद्वर्तिते तथा । उत्क्षिप्ता तु भवेत्पार्ष्णिरङ्गुष्ठाग्रेण संस्थितः ॥ २७९॥
In the elevated gait, during the raising and lowering movements, the foot is thrown up with the outer edge of the big toe touching the ground.
english translation
udattagamane caiva vartitodvartite tathA । utkSiptA tu bhavetpArSNiraGguSThAgreNa saMsthitaH ॥ 279॥
hk transliteration by Sanscript