Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
एकर्क्षे त्वेकराशौ हि विवाहः प्राणहानिदः ।स्त्रीधिष्ण्यादाद्यनवके स्त्रीदूरमतिनिंदितम् ॥ ४९८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 498.
A wedding with the same star and the same sign may put life at risk. Count from the woman's star. The man's star in the first nine is greatly blamed for distance.
Simple meaning: The same star and sign may put life at risk. His star within nine of hers is not good.
द्वितीये मध्यमं श्रेष्ठं तृतीये नवके नृभम् ।
Middle if the man's star is in the second nine, best in the third. A star group is named.
इति मर्त्यगणे ज्ञेयः स्यादमर्त्यगणः परः ।
That was the human group. The god group is Shravana, Punarvasu, Hasta, Swati, Revati, Anuradha, Ashvini, Pushya and Mrigashira.
रक्षोगणः पितृत्वाष्ट्रद्विदैवाग्नींद्रतारकाः ।
The demon group is Magha, Chitra, Vishakha, Krittika, Jyeshtha, Dhanishtha, Shatabhisha, Mula and Ashlesha.