إِن تُعَذِّبْهُمْ فَإِنَّهُمْ عِبَادُكَ ۖ وَإِن تَغْفِرْ لَهُمْ فَإِنَّكَ أَنتَ ٱلْعَزِيزُ ٱلْحَكِيمُ Qur’an Al-Ma'ida (5:118)In tuAAaththibhum fainnahum AAibaduka wain taghfir lahum fainnaka anta alAAazeezu alhakeemu
i.e., as your creation, they cannot escape the punishment.
A Master can justly punish His servants for disobedience: no one can say Him nay, for He is high above all. But if He chooses to forgive. He in His wisdom sees things that we mortals cannot see. This is the limit of intercession that men of God can make on behalf of sinners.