Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
नास्तंगते सिते जीवे न तयोर्बालवृद्धयोः ।न गुरौ सिंहराशिस्थे सिंहांशकगतेपि वा ॥ ४१८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 418.
Not when Venus or Jupiter has set. Not when they are child or old. Not when Jupiter is in Leo, or in a Leo navamsha (one-ninth part of a sign).
Simple meaning: Avoid marriage when Venus or Jupiter is set, very young or old, or when Jupiter is in Leo.
पश्चात्प्रागुदितः शुक्रो दशत्रिदिवसं शिशुः ।
Venus is weak 10 or 3 days after rising and 5 or 15 before setting. Jupiter, 15 days each.
अप्रबुद्धो हृषीकेशो यावत्तावन्न मंगलम् ।
No marriage while Vishnu sleeps, and none on the day of his festival.
न जन्ममासे जन्मर्क्षे न जन्मदिवसेऽपि च ।
A first child should not marry in the birth month, birth star or on the birthday.