Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 10 · Yatra and Omens
यात्रा शकुनाश्च
नवमाष्टमगो राहुर्नैर्ऋत्यां तु ललाटगः ।लग्नात्सप्तमगः सौरिः प्रतीच्यां तु ललाटगः ॥ ६३० ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 630.
Rahu in the 9th or 8th is on the forehead for the south-west. Saturn in the 7th from the lagna (rising sign) is on the forehead for the west.
Simple meaning: Rahu in the 9th or 8th spoils the south-west. Saturn in the 7th spoils the west.
षष्ठः पञ्चमगश्चन्द्रो वायव्यां च ललाटगः ।
The Moon in the 6th or 5th spoils the north-west. Mercury in the 4th spoils the north.
द्वित्रिस्थानगतो जीव ईशान्यां वै ललाटगः ।
Jupiter in the 2nd or 3rd spoils the north-east. For safety, do not go that way.
विलोमगो ग्रहो यस्य यात्रालग्नोपगो यदि ।
A planet moving backward in the rising sign of the journey can break the journey.