Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
यदि लग्नगतः सोपि दंपत्योर्मरणप्रदः ।स राशिः शुभसंयुक्तो लग्नं वा शुभसंयुतम् ॥ ४६१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 461.
If that sign is rising at the wedding, it too may put the couple's life at risk. Say that sign has good planets with it, or the lagna (rising sign) has good planets with it.
Simple meaning: If the 8th sign from theirs rises at the wedding, it may put the couple's life at risk.
लग्नं विवर्जयेद्यत्नात्तदंशांशतदीश्वराम् ।
Avoid that lagna, its navamsha and their lords. The 12th from their lagna or sign rising is next.
अर्थहानिस्तयोरस्मात्तदंशस्वामिनं त्यजेत् ।
That may bring loss of wealth, so leave out its navamsha lord too. The birth sign and birth lagna rising are good.
तयोरुपचयस्थानं लग्नेत्यंतशुभप्रदम् ।
A lagna in a growth house from the couple's signs is very good. A list of numbers begins.