Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
तदा भङ्गं विजानीयाज्जयमागन्तुकस्य च ।प्रवेशर्क्षचतुष्के तु सङ्ग्रामं चाऽऽरभेद्यदा ।तदा सिध्यति तद्दुर्गं न कुर्यात्तत्र विस्मयम् ॥ १३ ॥
In the full Agni Purana this is chapter 128, verse 13.
Then know there is defeat, and victory for the one who comes from outside. If one starts battle in the four entering nakshatras, then that fort falls. Do not be surprised at it.
Simple meaning: 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.
रविभौमार्कराहुस्थमशुभं स्याच्छुभं परम् ।
A star with the Sun, Mars, Saturn or Rahu is bad, otherwise good. Country, brother and wife are read here.