Tafsir of Al-Hijr 15:41

قال

(Allah) said, i.e., threatening and warning Iblis.

هذا صراط علي مستقيم

This is the way which will lead straight to Me. means, `all of you will return to Me, and I will reward or punish you according to your deeds: if they are good then I will reward you, and if they are bad then I will punish you.' This is like the Ayah:

إن ربك لبالمرصاد

Verily, your Lord is ever watchful. (89:14)

وعلى الله قصد السبيل

And it is up to Allah to show the right way. (16:9)