Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
स्थावरेषु स्थिरं ह्यृक्षं यात्रायां क्षिप्रमुत्तमम् ।सौभाग्यार्थे मृदून्येव उग्रेषूग्रं तु कारयेत् ॥ १६ ॥
In the full Agni Purana this is chapter 126, verse 16.
For fixed things, use a fixed nakshatra (star). For travel, a quick one is best. For good fortune, use only the soft ones. In the fierce ones, do a fierce work.
Simple meaning: Match the work to the nakshatra: fixed for lasting things, quick for travel, soft for luck, fierce for fierce work.
दारुणे दारुणं कुर्याद्वक्ष्ये चाधोमुखादिकम् ।
Harsh nakshatras suit harsh work. The down-facing nakshatras begin: Krittika, Bharani, Ashlesha, Vishakha and two more.
पूर्वात्रयमधोवक्त्रं कर्म चाधोमुखं चरेत् ।
Down-facing nakshatras suit digging wells and tanks, study and a doctor's treatment.
स्थापनं नौकाकूपादिविधानं खननं तथा ।
More work for down-facing nakshatras: setting up, boats, wells and digging. A new list starts.