Natyashastra
प्रग्रहग्रहणाद्यानमेवमेवापरेष्वपि । अश्वयाने गतिः कार्या वैशाखस्थानकेन तु ॥ १०८॥
Gait of a person riding a horse will consist of the Vaiśākha Sthāna (posture) and short foot steps of various kinds.
english translation
pragrahagrahaNAdyAnamevamevApareSvapi । azvayAne gatiH kAryA vaizAkhasthAnakena tu ॥ 108॥
hk transliteration by Sanscript