Arthashastra
मित्र व्यञ्जनो वा बाह्यस्य प्रेषयेत् "क्षीणम् अस्मिन् दुर्गे धान्यं स्नेहाः क्षारो लवणं वा, तद् अमुष्मिन् देशे काले च प्रवेक्ष्यति, तद् उपगृहाण" इति ॥
A pretending friend may send information to an outsider: "Grains, oil and jaggery and salt stored in the fort (of the enemy) have been exhausted; a fresh supply of them is expected to reach the fort at such and such a place and time; seize it by force."
english translation
mitra vyaJjano vA bAhyasya preSayet "kSINam asmin durge dhAnyaM snehAH kSAro lavaNaM vA, tad amuSmin deze kAle ca pravekSyati, tad upagRhANa" iti ॥
hk transliteration by Sanscript