Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
रौद्रश्चैव तथा श्वेतो मैत्रः सारभटस्तथा ।सावित्रो विरोचनश्च जयदेवोऽभिजित्तथा ॥ १५ ॥
In the full Agni Purana this is chapter 123, verse 15.
Raudra, Shveta, Maitra and Sarabhata. Savitra, Virochana, Jayadeva and Abhijit.
Simple meaning: This lists the first eight named parts of the day.
रावणो विजयश्चैव नन्दी वरुण एव च ।
Seven more names complete the fifteen named parts of the day.
रौद्रे रौद्राणि कुर्वीत श्वेते स्नानादिकं चरेत् ।
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.