Translation:

3. Who forgiveth Sin accepteth Repentance is strict in Punishment and hath a Long Reach (in all things). There is no god but He: to Him is the Final Goal.

Notes (Tafseer)

4358. Allah's knowledge is supreme and all-reaching. But there are other attributes of His, which concern us even more intimately; e.g., He forgives sin and accepts our repentance when it is sincere and results in our change of heart and life: but He is also just, and strict in punishment; and so no loophole will be left for Evil except in repentance. And further, all His attributes reach forward to everything: His Mercy, as well as His Knowledge and Justice; His Bounties as well as His Punishments.