Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
मेषादिषु विलग्नेषु शुद्धेष्वेवं प्रसिद्ध्यति ।क्रूरग्रहेक्षितेषूग्रसंयुतेषूग्रमेव हि ॥ ३०२ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 302.
When the lagna (rising sign) from Aries on is clean, the acts succeed as said. When cruel planets look at it, or fierce ones join it, only fierce acts succeed.
Simple meaning: A clean rising sign works as listed. With cruel planets on it, only fierce acts succeed.
गोयुग्मकर्ककन्यांत्यतुलाचापधराः शुभाः ।
Seven signs are good and the others are bad.
ग्रहयोगावलोकाभ्यां राशिर्धत्ते ग्रहोद्भवम् ।
A sign gives a planet's result through joining or looking. Without them it acts by its own nature.
आदौ संपूर्णफलदं मध्ये मध्यफलप्रदम् ।
A rising sign gives full results at its start and small ones at its end.