Natyashastra
पार्श्वक्रान्तैद्रुताविद्धैः सूचीविद्धैस्तथैव च । कलाकालगतैः पादैरावेगे योजयेत् गतिम् ॥ ५८॥
The gait should be performed with swift sideways steps, rapid stabbing movements, and linear (sūcī) steps, all timed properly with rhythm and tempo, and combined with fast footwork.
english translation
pArzvakrAntaidrutAviddhaiH sUcIviddhaistathaiva ca । kalAkAlagataiH pAdairAvege yojayet gatim ॥ 58॥
hk transliteration by Sanscript