Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 10 · Yatra and Omens
यात्रा शकुनाश्च
शत्रुजन्मोदये जन्मराशेर्वा निधनोदये ।तयोरीशस्थिते राशौ यातुः शत्रुक्षयो भवेत् ॥ ६४५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 645.
Say the lagna (rising sign) is the enemy's birth rising sign. Or it is the 8th from his birth sign, or the sign where their lords stand. Then the traveler may overcome enemies.
Simple meaning: The enemy's birth rising sign or his 8th sign as lagna can help the traveler overcome enemies.
वक्रः पन्था मीनलग्ने यातुर्मीनांशकेपि वा ।
Pisces can make the road crooked. Aquarius is not advised for any journey.
जललग्नो जलांशो वा जलयोनेः शुभावहः ।
A water sign is good for water travel. The first five houses are body, treasury, bowman, vehicle and counsel.
शत्रुमार्गस्तथायुश्च मनोव्यापारसंज्ञिकम् ।
Houses 6 to 12 are enemy, road, life, mind, action, gain and no-gain.