Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
पितामहोक्तं संवीक्ष्य लग्नशुद्धिं प्रवच्म्यहम् ।पुण्येऽह्नि लक्षणोपेतं सुखासीनं सुचेतसम् ॥ ३९६ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 396.
Having studied what the Grandfather (Brahma) said, I will tell how to check the lagna (rising sign). On a holy day, go to an astrologer who has good marks, sits at ease and has a good mind.
Simple meaning: On a holy day, go to a calm, worthy astrologer to check the marriage lagna.
प्रणम्य देववत्पृच्छेद्दैवज्ञं भक्तिपूर्वकम् ।
The one asking bows to the astrologer and brings betel leaves, fruit and flowers.
तत्र चेल्लग्नगः क्रूरस्तस्मात्सप्तमगः कुजः ।
A bad planet in the lagna with Mars in the 7th may put the couple's life at risk within eight years.
यदि लग्नगतश्चंद्रस्तस्मात्सप्तमगः कुजः ।
The Moon in the lagna with Mars in the 7th may bring a risk to the husband's life within eight years.