Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
यस्मिन्नृक्षे स्थितो राहुस्तदृक्षं फणिमूर्धनि ।तदादि विन्यसेद्भानि सप्तविंशत्क्रमेण (?) तु ॥ ७ ॥
In the full Agni Purana this is chapter 126, verse 7.
In whichever nakshatra (star) Rahu stands, that nakshatra is on the snake's head. Start from it and set out the nakshatras in order, twenty-seven of them. (Our text is unclear here: the print puts a question mark after 'in order of twenty-seven'.)
Simple meaning: Rahu's nakshatra goes on the snake's head. The other nakshatras follow in order, twenty-seven in all.
वक्त्रे सप्तगत ऋक्षे म्रियते सर्व आहवे ।
A star among the seven on the snake's mouth can mean death in battle; on the shoulder, defeat.
उदरस्थेन पूजा च जयश्चैवाऽऽत्मनस्तथा ।
Belly brings honour and victory. Waist helps a fighter overpower the enemy in battle.
पुच्छस्थितेन कीर्तिः स्याद्राहुदृष्टे च भे मृतिः ।
Tail brings fame. A nakshatra that Rahu looks at can bring death.