Natyashastra
कार्या पाशुपतानां च गतिरुद्धतगामिनी । अन्धकारेऽथ याने च गतिः कार्या प्रयोक्तृभिः ॥ ८७॥
Gait [of a person] walking in darkness or Gait of a blind [man] should consist of feet gliding over the ground and hands groping for the way.
english translation
kAryA pAzupatAnAM ca gatiruddhatagAminI । andhakAre'tha yAne ca gatiH kAryA prayoktRbhiH ॥ 87॥
hk transliteration by Sanscript