Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
बुधश्चैवेन्दू राहुश्च सर्वे ते फलदा ग्रहाः ।बुधशुक्रौ चतुर्थौ च शेषाश्चैव भयावहाः ॥ ६ ॥
In the full Agni Purana this is chapter 127, verse 6.
And Mercury, the Moon and Rahu: all those planets give their results. Mercury and Venus in the 4th house are good. All the others bring fear.
Simple meaning: Mercury and Venus in the 4th house are good. Other planets there bring fear.
पञ्चमस्थो यदा जीवः शुक्रः सौम्यश्च चन्द्रमाः ।
Jupiter, Venus, Mercury and Moon in the 5th house give wanted gains. The Sun is good in the 6th.
चन्द्रः सौरिर्मङ्गलश्च ग्रहा देवि स्वराशितः ।
Moon, Saturn, Mars and Mercury in the 6th from the birth sign are good. Jupiter and Venus there are not.
सप्तमोऽर्कः शनिभौमो राहुर्हान्यै सुखाय च ।
In the 7th, Sun, Saturn, Mars and Rahu bring loss; Jupiter, Venus and Mercury bring joy. Mercury and Venus suit the 8th.