Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Travel Muhurta
यात्रामण्डलचिन्ता
सप्ताङ्गस्य तु राज्यस्य विघ्नकर्तॄन्विनाशयेत् ।मण्डलेषु च सर्वेषु वृद्धिः कार्या महीक्षिता ॥ १३ ॥
In the full Agni Purana this is chapter 233, verse 13.
A king should destroy those who block the seven-limbed kingdom. He should bring growth in all the circles.
Simple meaning: A king should remove whoever blocks his kingdom and grow in every circle around him.
आत्ममण्डलमेवात्र प्रथमं मण्डलं भवेत् ।
The king's own land is the first circle. The kings on its border are its enemies.
उपेतस्तु सुहृज्ज्ञेयः शत्रुमित्रमतः परम् ।
Know the friend, then the enemy's friend, then the friend's friend, then that one's enemy.
एतत्पुरस्तात्कथितं पश्चादपि निबोध मे ।
Now hear about the kings behind: first the enemy at the rear, then the ally at the rear.