Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
ग्रस्तास्ते त्रिदिनं पूर्वं पश्चाद्ग्रस्तोदयेऽथवा ।संध्यायां त्रिदिनं तद्वन्निशीथे सप्त एव च ॥ ४२४ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 424.
If the eclipse is at setting, avoid three days before. If it is at rising, three days after. For an eclipse at twilight, three days likewise. For one at midnight, seven.
Simple meaning: Avoid days around an eclipse: three days, or seven if it falls at midnight.
मासान्ते पंच दिवसांस्त्यजेद्रिक्तां तथाष्टमीम् ।
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.