Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Dashas, Yogas, Placements
जातकम् २
शुभग्रहे दलं स्वर्क्षे मित्रभेंऽघ्रिमितं फलम् ।शत्रुभेऽल्पं तथा नीचास्तंगते फलशून्यता ॥ २५७ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 257.
For a good planet: half the result in its own sign. A quarter in a friend's sign. Little in an enemy's sign. In its low point, or when set, no result.
Simple meaning: A planet gives half its result in its own sign, a quarter in a friend's, nothing when low or set.
खभराकादिके खेटे कुलतुल्यः कुलाधिकः ।
The more planets in their own signs, the higher the person rises, from family level up to king.
परवित्तसुहृद्बंधुपोष्यागणबलाधिपौ ।
The more planets in friends' signs, the higher the rise, from living on others to king.
विषमर्क्षेऽर्कहोरायां संस्थिते शुभभेषु च ।
Planets in odd signs in the Sun's half give fame, effort, brightness, wisdom, wealth and strength.