His mercy was unparalleled.
And most often shown when he dealt with those who strove against him.
An example of his vast mercy can be seen during the conquest of Makkah, when the Muslims took back their home city from those who had driven them out mercilessly.
On that victorious day, as Muhammad ﷺ and his companions, ten thousand in number, entered the city of their birth and homeland, many who resided there feared the worst to happen; exile or death. So they stayed locked up in their homes, knowing that they were helpless in this situation and completely at the mercy of the Prophet ﷺ. For after 23 years of unrest in Makkah, 10 years of persecution, torture and boycotting, 13 years of war and living outside of a place they once called home, the Muslims had finally returned. So what was to be their fate?