Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
पाद एव शुभैर्विद्धमशुभं नैव कृत्स्नभम् ।क्रूरविद्धं युतं धिष्ण्यं निखिलं नैव मंगलम् ॥ ४७४ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 474.
A star pierced by good planets is spoiled only in its quarter; it is not bad as a whole star. A star pierced or joined by cruel planets is not good in any part.
Simple meaning: A star pierced by good planets is spoiled only in one quarter. One hit by cruel planets is not good at all.
तुलामिथुनकन्यांशा धनुरंत्यार्द्धसंयुताः ।
Navamshas of Libra, Gemini, Virgo, Taurus and the last half of Sagittarius give good results.
अंत्यांशास्तेपि शुभदा यदि वर्गोत्तमाह्वयाः ।
Last navamshas are good only if the same sign shows in the chart and navamsha. Others are bad.
कुनवांशकलग्नं यत्त्याज्यं सर्वगुणान्वितम् ।
Avoid a lagna in a bad navamsha, and avoid a day with a great fall-point fault.