Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
द्वितीयं गण्डमाख्यातं तृतीयं भैरवि शृणु ।ज्येष्ठामूलभयोर्मध्य उग्ररूपं तु यामकम् ॥ ३५ ॥
In the full Agni Purana this is chapter 126, verse 35.
The second is called Ganda. Hear the third, O Bhairavi. Between Jyeshtha and Moola there is a fierce stretch of one yama (three-hour part of the day).
Simple meaning: The third edge, between Jyeshtha and Moola, is a fierce stretch of time.
न कुर्याच्छुभकर्माणि यदीच्छेदात्मजीवितम् ।
Avoid good works at these times. A child born then can bring death to the parents.
विष्कम्भे घटिकास्तिस्रः शूले पञ्च विवर्जयेत् ।
In some bad almanac combinations, avoid a set stretch of time, from about one to four hours.
परिघे च व्यतीपात उभयोरपि तद्दिनम् ।
Avoid travel and war for the whole day in a few bad almanac combinations.