Verse 85of 110

His traveling and reaching the Place where the Sun sets (the West)فَأَتْبَعَ سَبَباً (So he followed a way.) Ibn `Abbas said that he followed different routes to achieve what he wanted.فَأَتْبَعَ سَبَباً (So he followed a way.) Mujahid said that he followed different routes, east and west. According to one report narrated from Mujahid, he said:سَبَباً(a way) means, "A route through the land." Qatadah said, "It means he followed the routes and landmarks of the earth.

Source: Tafsir Ibn Kathir — abridged excerpt