Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
पापग्रहयुते चन्द्रे दंपत्योर्मरणं भवेत् ।शुभग्रहयुते चंद्रे स्वोच्चस्थे मित्रराशिगे ॥ ४५८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 458.
When the Moon is joined by bad planets, the lives of husband and wife may be at risk. When the Moon is joined by good planets, in its own high sign or in a friend's sign,
Simple meaning: The Moon with bad planets may put life at risk. With good planets in a strong sign it helps.
दोषायनं भवेल्लग्नं दंपत्योः श्रेयसे सदा ।
With good planets and a strong Moon, the lagna's faults go and it favours the couple.
पापग्रहयुतश्चंद्रः करोति मरणं तयोः ।
The Moon with bad planets may put the couple's life at risk. The 8th from their lagna and sign comes next.
यदि लग्नगतः सोपि दंपत्योर्मरणप्रदः ।
If the 8th sign from theirs rises at the wedding, it may put the couple's life at risk.