Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
तत्र चेल्लग्नगः क्रूरस्तस्मात्सप्तमगः कुजः ।दंपत्योर्मरणं वाच्यं वर्षाणामष्टकात्पुरा ॥ ३९८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 398.
Say a bad planet is in the lagna (rising sign). Say Mars is in the 7th from it. Then husband and wife may face a risk to life before eight years.
Simple meaning: 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.
लग्नात्पंचमगः पापः शत्रुदृष्टश्च नीचगः ।
A weak, afflicted bad planet in the 5th may bring the bride grief over children or unsteady conduct.
तृतीयपंचसप्तायकर्मगो वा निशाकरः ।
The Moon in the 3rd, 5th, 7th, 10th or 11th, seen by Jupiter, joins the couple.