Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
गतिस्तीक्ष्णाजचरणाहिर्बुध्न्यभाश्रिभेषुया ।योमातिकातिविश्वांबुमूलमत्स्यैन्यजस्य च ॥ ४६ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 46.
The sharp path is in Purva Bhadrapada, Uttara Bhadrapada and Ashvini. The Yogantika path is in Uttara Ashadha, Purva Ashadha and Mula, and more. (Our text is unclear here: the end of the line is garbled; it may name Revati and Jyeshtha.)
Simple meaning: Mercury's path is sharp in some stars and Yogantika in others.
घोरा गतिर्हरित्वाष्ट्रवसुवारुणभेषु च ।
Mercury's path is fierce in some stars and bad in others.
प्राकृताद्यासु गतिषु ह्युदितोऽस्तमितोपिवा ।
In each path, Mercury stays hidden for as many days as it was seen.
चत्वारिंशत्क्रमात्रिंशद्रवींदू भूसुतो नव ।
Mercury stays seen a set number of days in each of its seven paths.