Natyashastra
पादः प्रसारितः सव्यः पुनश्चैवोपसर्पितः । वामः सव्यापसर्पी च चाषगत्यां विधीयते ॥ १८॥
Cāṣagati—the right foot put forward and then drawn back and at the same time left foot drawn back and put forward afterwards.
english translation
pAdaH prasAritaH savyaH punazcaivopasarpitaH । vAmaH savyApasarpI ca cASagatyAM vidhIyate ॥ 18॥
hk transliteration by Sanscript