Surah Al-Qasas Verse 16 - English Translation by Shabbir Ahmed
Surah Al-Qasasقَالَ رَبِّ إِنِّي ظَلَمۡتُ نَفۡسِي فَٱغۡفِرۡ لِي فَغَفَرَ لَهُۥٓۚ إِنَّهُۥ هُوَ ٱلۡغَفُورُ ٱلرَّحِيمُ
And he prayed, "My Lord! Verily, I have hurt my 'Self'. Forgive me then." And He forgave him - for, indeed, He is the Forgiving, the Merciful. (Moses had intended only to help the weak and not to kill the other man)