Arthashastra
एवं समाहर्तृ प्रदिष्टास् तापस व्यञ्जनाः कर्षक गो रक्षक वैदेहकानाम् अध्यक्षाणां च शौच आशौचं विद्युः ॥
Similarly spies under the guise of ascetics shall, as ordered by the Collector-general, gather information as to the proceedings, honest or dishonest, of cultivators, cow-herds, merchants, and heads of Government departments.
english translation
evaM samAhartR pradiSTAs tApasa vyaJjanAH karSaka go rakSaka vaidehakAnAm adhyakSANAM ca zauca AzaucaM vidyuH ॥
hk transliteration by Sanscript