Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
ज्योतिःशास्त्रादिसारं च वक्ष्ये युद्धजयार्णवे ।वेलामन्त्रौषधाद्यं च यथोमामीश्वरोऽब्रवीत् ॥ १ ॥
In the full Agni Purana this is chapter 124, verse 1.
I will tell the essence of jyotisha (astrology) and the rest, in the Yuddhajayarnava. I will tell the vela (time of day), the mantras, the herbs and the rest, as Ishvara told Uma.
Simple meaning: The essence of astrology, times of day, mantras and herbs is told, as Shiva told Uma.
देवैर्जिता दानवाश्च येनोपायेन तद्वद ।
Uma asks how the gods beat the demons. The knowledge of good and bad signs is the Yuddhajayarnava.
मूलदेवेच्छया जाता शक्तिः पञ्चदशाक्षरा ।
From the first god's will came a fifteen-syllable power, and from her the world. Worshipping her gives all knowledge.
मन्त्रपीठं प्रवक्ष्यामि पञ्चपन्त्रसमुद्भवम् ।
The seat of mantras comes from five mantras, which hold the life and death of all mantras.