Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
प्रवेशभे प्रवेष्टव्यं निर्गमभे च निर्गमे(च्छे)त् ।भृगुः सौम्यस्तथा भौम ऋक्षान्तं सकलं यदा १२
In the full Agni Purana this is chapter 128, verse 12.
Enter at the nakshatra (star) for entering, and leave at the nakshatra for leaving. When Venus, Mercury and Mars are in the whole nakshatra, up to its end,
Simple meaning: Enter the fort in the entering nakshatra, and leave in the leaving one. Venus, Mercury and Mars matter here.
तदा भङ्गं विजानीयाज्जयमागन्तुकस्य च ।
Then defeat comes, and the outsider wins. Starting battle in the four entering nakshatras brings the fort down.
नाडीयं प्रथमा चान्या याम्यं मृगशिरस्तथा ।
A row of nakshatras is named: Bharani, Mrigashira, Pushya, Purva Phalguni, Chitra, Anuradha, Purva Ashadha, Dhanishtha.
नाडीत्रितयसंजुष्टग्रहाज्ज्ञेयं शुभाशुभम् ।
Planets sitting on the three lines show good and bad results.