Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Travel Muhurta
यात्रामण्डलचिन्ता
प्रतिलोमे च विध्वस्ते शुक्रे यात्रां विवर्जयेत् ।प्रतिलोमे बुधे यात्रां दिक्पतौ च तथा ग्रहे ॥ २ ॥
In the full Agni Purana this is chapter 233, verse 2.
Avoid travel when Venus is moving backward or ruined. Avoid travel when Mercury is moving backward. Avoid it the same way when the planet that rules the direction is so.
Simple meaning: Avoid travel when Venus, Mercury or the planet of your direction is moving backward or ruined.
वैधृतौ च व्यतीपाते नागे च शकुनौ तथा ।
Do not travel on the bad Sun and Moon yogas or on the fixed bad half-days.
विपत्तारे नैधने च प्रत्यरौ चाथ जन्मनि ।
Avoid travel on the unlucky star counts, on the birth star, at sign edges and on empty moon days.
उदीची च तथा प्राची तयोरैक्यं प्रकीर्तितम् ।
North and east go together as one. West and south go together as one.