Al-Ma'idah 5:118

In tuAAaththibhum fa-innahum AAibadukawa-in taghfir lahum fa-innaka anta alAAazeezu alhakeem

If You should punish them - indeed they are Your servants; but if You forgive them - indeed it is You who is the Exalted in Might, the Wise."

If You punish them, they are Your slaves after all, but if You forgive them, You are the Mighty, the Wise.”