Arthashastra
चिर संसृष्टा वा गो वाणिजका गवाम् अज अवीनां वा यूथान्य् अवस्कन्द कालेषु परेषां मोह स्थानेषु प्रमुञ्चेयुः, अश्व खर उष्ट्रमहिष आदीनां दुष्टांश् च ॥
Spies, let off as traders in cattle for a long time, may leave herds of cattle, sheep, or goats in tempting places so as to divert the attention of the enemy from the attack which they (the enemy) intend to make; spies as cowherds may let off such animals as are ferocious among horses, mules, camels, buffaloes and others beasts, having smeared the eyes of those animals with the blood of a musk-rat (chuchundari).
english translation
cira saMsRSTA vA go vANijakA gavAm aja avInAM vA yUthAny avaskanda kAleSu pareSAM moha sthAneSu pramuJceyuH, azva khara uSTramahiSa AdInAM duSTAMz ca ॥
hk transliteration by Sanscript