Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
पौष्णभत्र्युत्तरामैत्रमरुच्चंद्रार्कपित्र्यभैः ।समूलभैरविद्धैस्तैः स्त्रीकरग्रह इष्यते ॥ ४२६ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 426.
A wedding is good under these nakshatras (stars): Revati, the three Uttaras, Anuradha, Svati, Mrigashira, Hasta, Magha and Mula. They must not be pierced.
Simple meaning: 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.
चंद्रताराबलं वीक्ष्य ततः पंचांगजं बलम् ।
Check the Moon and star strength, then the almanac parts, which count one, two and three.