Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
मासान्ते पंच दिवसांस्त्यजेद्रिक्तां तथाष्टमीम् ।व्यतीपातं वैधृतिं च संपूर्णं परिघार्द्धकम् ॥ ४२५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 425.
Drop the last five days of the month. Drop the Rikta (empty tithi) and the 8th tithi (moon day). Drop all of Vyatipata (a bad Sun and Moon yoga) and Vaidhriti. Drop half of Parigha.
Simple meaning: Avoid the last five days of the month, certain bad moon days and some yoga times.
पौष्णभत्र्युत्तरामैत्रमरुच्चंद्रार्कपित्र्यभैः ।
Marry under Revati, the Uttaras, Anuradha, Svati, Mrigashira, Hasta, Magha or Mula.
विवाहे बलमावश्यं दंपत्योर्गुरुसूर्ययोः ।
Jupiter and the Sun must be strong for the couple, or worship is done.
गोचरं वेधजं चाष्टवर्गजं रूपजं बलम् ।
Transit strength is the roughest. Blocking, ashtakavarga and counted strength are each finer.