Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
शनिचक्रे चार्धमासं ग्रहाणामुदयः क्रमात् ।विभागैः पञ्चदशभिः शनिभागस्तु मृत्युदः ॥ ८ ॥
In the full Agni Purana this is chapter 123, verse 8.
In the Saturn wheel, the planets rise in order for half a month. In fifteen parts, Saturn's part gives death.
Simple meaning: In the Saturn wheel, Saturn's part among the fifteen parts can bring death.
दशकोटिसहस्राणि अर्बुदं न्यर्बुदं हरेत् ।
The tortoise figure runs from Magha to Krittika. Saturn there can ruin the land it rules.
राहुचक्रे च सप्तोर्ध्वमधः सप्त च संलिखेत् ।
In the Rahu wheel, seven lines are drawn above and seven below, and the full moon day starts in the south-east.
अमावास्यां वायवे च राहुर्वै तिथिरूपकः ।
The new moon day is in the north-west. Write ra on the south side and ha in the north-west.