Arthashastra
तम् एतेषु कलह स्थानेषु कर्म प्रतिघातेषु वा विवदमानं तीक्ष्णाः शस्त्रं पातयित्वा प्रच्छन्नं हन्युः ॥
When a quarrel arises between the two parties at work, fiery spies under cover may throw their weapons and murder the seditious person.
english translation
tam eteSu kalaha sthAneSu karma pratighAteSu vA vivadamAnaM tIkSNAH zastraM pAtayitvA pracchannaM hanyuH ॥
hk transliteration by Sanscript