Arthashastra
सत्त्रिणो मित्र व्यञ्जना वा बाह्यानां चारम् एषां ब्रूयुः "अयं वो राजा दूष्य व्यञ्जनैर् अतिसंधातु कामः, बुध्यध्वम्" इति ॥
Spies under the guise of friends may inform foreigners: "Mind, this man is desirous of deceiving you with the help of his own spies who are disguised as traitors."
english translation
sattriNo mitra vyaJjanA vA bAhyAnAM cAram eSAM brUyuH "ayaM vo rAjA dUSya vyaJjanair atisaMdhAtu kAmaH, budhyadhvam" iti ॥
hk transliteration by Sanscript