﴿ وَيُذْهِبْ غَيْظَ قُلُوبِهِمْ ۗ وَيَتُوبُ ٱللَّهُ عَلَىٰ مَن يَشَآءُ ۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌ ﴾

“and will remove the wrath that is in their hearts. And God will turn in His mercy unto whom He wills: for, God is all-knowing, wise.”

And He will remove the rage the grief in their hearts. God turns in forgiveness to whomever He will when they return to Islam as in the case of Abū Sufyān. And God is Knowing Wise.