Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
सौम्यमार्गे च तिसृषु चरन्वीथिषु भार्गवः ।धान्यार्थवृष्टिसस्यानां परिपूर्तिं करोति हि ॥ ६७ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 67.
Venus, moving in the three lanes of the northern path, brings full grain, wealth, rain and crops.
Simple meaning: 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.
स्वातित्रये पश्चिमायां तस्यां शुक्रस्तथाविधः ।
Venus in the west in the Svati group also brings rain. The opposite brings drought; Mercury adds rain.
कृष्णाष्टम्यां चतुर्दश्याममायां च यदा सितः ।
Venus rising or setting on those days tends to bring heavy rain.