Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Dashas, Yogas, Placements
जातकम् २
चरे सन्मध्यदुष्टाभ्यामंगभंगे विपर्ययात् ।स्थिरे नेष्टेष्टमध्या च होरायास्त्र्यंशकैः फलम् ॥ १४९ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 149.
In a moving sign, the thirds of the lagna (rising sign) give good, middle and bad in order. In the dual sign, they run the other way round. In a fixed sign, they give bad, good and middle.
Simple meaning: The result depends on which third of the rising sign it is and whether the sign moves, stays fixed or is dual.
स्वामीज्यज्ञयुता होरा दृष्टा वा सत्फलावहा ।
A rising sign with its lord, Jupiter or Mercury gives good results. Bad planets on both sides spoil it.
प्राग्ध्वांक्षा बंधुमृत्याय तयोर्द्यूने रविः स्वभात् ।
This lists the houses where the Sun gets points, counted from itself, Mars, Saturn and Venus.
धर्मध्यायारिगो जीवादिकत्र्यारिगो विधोः ।
More houses where the Sun gets points, counted from Jupiter, the Moon, Mercury and one more.