Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Dashas, Yogas, Placements
जातकम् २
यस्य कस्यापि तनयः प्रोक्तैर्योगैर्नृपो भवेत् ।वक्ष्यमाणैर्नृपसुतो ज्ञेयो भूयो मुनीश्वर ॥ १७८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 178.
A person born to anyone becomes a king by the combinations told. By the ones still to be told, know him a king's son, again, O best of sages.
Simple meaning: These combinations make a king. The next ones make a king's son.
स्वोच्चे त्रिकोणभगते त्र्याद्यैर्बलयुतैर्नृपः ।
Three strong planets in high or own strong signs make a king.
चापे जीवे धरानाथःस्यादथ स्वर्क्षगे भृगौ ।
Jupiter in Sagittarius finishes one ruler's chart. Venus in the 4th and the Moon in the 9th start another.
त्रिलग्नभवगैःशेषैर्धराधीशः प्रजायते ।
Venus in the 4th, the Moon in the 9th and the rest in the 3rd, 1st and 11th make a ruler.