With proper attention the king should engage his spies to watch the actions of all his counsellors and friends and sons, in his city and the provinces, and in the territories of feudatory chiefs. His spies should be so employed that they may not know one another.
अमात्येषु च सर्वेषु मित्रेषु विविधेषु च। पुत्रेषु च महाराज प्रणिदध्यात् समाहितः॥ पुरे जनपदे चैव तथा सामन्तराजसु। यथा न विद्युरन्योन्यं प्रणिधेयास्तथा हि ते॥