Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
रौद्रे रौद्राणि कुर्वीत श्वेते स्नानादिकं चरेत् ।मैत्रे कन्याविवाहादि शुभं सारभटे चरेत् ॥ १७ ॥
In the full Agni Purana this is chapter 123, verse 17.
In Raudra, do harsh work. In Shveta, do bathing and the like. In Maitra, do a girl's marriage and the like. In Sarabhata, do good work.
Simple meaning: Each named part of the day suits its own work, such as harsh work, bathing and marriage.
सावित्रे स्थापनाद्यं वा विरोचने नृपक्रिया ।
Savitra suits installing, Virochana a king's work, Jayadeva victory and Ravana battle.
विजये कृषिवाणिज्यं पटबन्धं च नन्दिनि ।
Vijaya suits farming and trade, Varuna tanks, and Yama destructive work.
सौम्ये सौम्यादि कुर्वीत भवेल्लग्नमहर्दिवा ।
By day the named part of the day acts as the rising sign. Good names make good combinations.