हितोपदेश - विग्रह - चारः

भवेत्स्व परराष्ट्राणां कार्यकार्यविलोकने |
चारचक्षुर्महीभर्तुर्यस्य नास्त्यांध एव सः ||

- हितोपदेश, विग्रह

"What is going on?" and "What must go on?" in his country and in his neighbouring country are the questions that a king must know. To do this he must have a good network of spies.

- Hitopadesha, Vigraha