Arthashastra
पत्ति व्यूहः पुरस्ताद् आवरणिनः पृष्ठतो धन्विनः ॥
In a foot array , ॥ place॥ armored foot-soldiers in the front and archers in the rear.
english translation
patti vyUhaH purastAd AvaraNinaH pRSThato dhanvinaH ॥
hk transliteration by Sanscript