Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
सौम्यमध्यमयाम्येषु मार्गेषु वीथिकात्रयम् ।शुक्रस्य दस्रभाज्ज्ञेयं पर्यायैश्च त्रिभिस्त्रिभिः ॥ ६५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 65.
In the northern, middle and southern paths there are three lanes each. Venus's lanes are counted from Ashvini, in three rounds of three nakshatras (stars) each.
Simple meaning: Venus moves in three paths with three lanes each. They are counted from Ashvini in groups of three stars.
नागेभैरावताश्चैव वृषभोष्ट्रखराह्वयाः ।
The nine lanes of Venus are named after the snake, elephant, bull, camel, donkey, deer, goat and fire.
सौम्यमार्गे च तिसृषु चरन्वीथिषु भार्गवः ।
Venus in the northern lanes tends to bring plenty of grain, wealth and rain.
मध्यमार्गे च तिसृषु सर्वमप्यधमं फलम् ।
Venus in the middle lanes gives poor results. Seen in the east in the Magha group, it brings good rain.