Arthashastra
सार्थ गण वासिभिर् आतिवाहिकैः कन्या वाहिकैर् अश्व पण्य व्यवहारिभिर् उपकरण हारकैर् धान्य क्रेतृ विक्रेतृभिर् वा प्रव्रजित लिङ्गिभिर् दूतैश् च दणड् अतिनयनम्, संधि कर्म विश्वासन अर्थम् ॥
Or taking advantage of peace and friendship with the enemy, army and weapons may be collected inside the enemy's fort by spies disguised as merchants, caravans, processions leading a bride, merchants selling horses, peddlers trading in miscellaneous articles, purchasers or sellers of grains, and as ascetics.
english translation
sArtha gaNa vAsibhir AtivAhikaiH kanyA vAhikair azva paNya vyavahAribhir upakaraNa hArakair dhAnya kretR vikretRbhir vA pravrajita liGgibhir dUtaiz ca daNaD atinayanam, saMdhi karma vizvAsana artham ॥
hk transliteration by Sanscript