Arthashastra
ऋक्ष चर्म कञ्चुकिनो वा अग्नि धूम उत्सर्ग युक्ता रक्षो रूपं वहन्तस् त्रिर् अपसव्यं नगरं कुर्वाणाः श्व सृगाल वाशित अन्तरेषु तथैव ब्रूयुः ॥
Spies, wearing coats formed of the skins of bears and sending out volumes of smoke from their mouth, may pretend to be demons, and after circumambulating the city thrice from right to left, may shout aloud as before at a place full of the horrid noise of antelopes and jackals.
english translation
RkSa carma kaJcukino vA agni dhUma utsarga yuktA rakSo rUpaM vahantas trir apasavyaM nagaraM kurvANAH zva sRgAla vAzita antareSu tathaiva brUyuH ॥
hk transliteration by Sanscript