Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 10 · Yatra and Omens
यात्रा शकुनाश्च
द्वादशैकादशः शुक्रोऽप्याग्नेय्यां तु ललाटगः ।दशमस्थः कुजो लग्नाद्याभ्यां यातुर्ललाटगः ॥ ६२९ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 629.
For the south-east, Venus in the 12th or 11th is on the forehead. For one going south, Mars in the 10th from the lagna (rising sign) is on the forehead.
Simple meaning: Venus in the 12th or 11th spoils the south-east. Mars in the 10th spoils the south.
नवमाष्टमगो राहुर्नैर्ऋत्यां तु ललाटगः ।
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.