Dua 123
If you have abused or insulted anyone
اللَّهُمَّ فأَيُّمَا مُؤْمِنٍ سَبَبْتُهُ فَاجْعَلْ ذَلِكَ لَهُ قُرْبَةً إِلَيْكَ يَوْمَ الْقِيَامَةِ
Allaahumma fa ayyumaa mu’minin sababtuhu faj‛al dhaalika lahu qurbatan ilayka yawm-al-qiyaamah
“O Allah, any believer whom I have insulted, let that be cause to draw him near to You on the Day of Resurrection”
Bukhari 6361; Muslim 2601