Surah Al-Mu'minun (The Believers), Verse 118

وَقُلْ رَّبِّ اغْفِرْ وَارْحَمْ وَاَنْتَ خَیْرُ الرّٰحِمِیْنَ 

Wa qul Rabbigh fir warham wa Anta khairur raahimeen

“So say: "O my Lord! grant Thou forgiveness and mercy for Thou art the Best of those who show mercy!"”

Quran 23:118 (Yusuf Ali Translation)