Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Dashas, Yogas, Placements
जातकम् २
अंतर्दशासु विदशास्तासु चोपदशास्तथा ।दशेशमित्रस्वोच्चक्षंगोब्जोब्ध्येकाद्रिवृद्धिगः ॥ १४२ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 142.
Inside the apahara (sub-period) come the vidasha (still smaller period), and inside those the upadasha (smaller period within that). Take a planet that is a friend of the dasha (planet period) lord. Or one in its own or high sign. Or one in the 9th, 4th, 1st, 7th or 11th, or in the place called abja. (Our text is unclear here: the house meant by abja.)
Simple meaning: A planet friendly to the dasha lord, in its own or high sign, or in a good house, helps.
शुभगो यद्भगस्तद्भिस्न्वादिस्थेन तद्धिकृत् ।
A planet in a good place helps that house. One in a bad place can harm it.
खगस्य यद्भवेद्द्रव्यं भावभे क्षणयोगजम् ।
Money and livelihood from a planet show up in that planet's dasha.
विशन्यापदशायां यो वैरिदृष्टो विपत्तिकृत् ।
A planet looked at by an enemy brings trouble. One looked at by a friend helps.