Surah No. 6, Al Anaam, Ayat No. 160
o مَن جَاء بِالْحَسَنَةِ فَلَهُ عَشْرُ أَمْثَالِهَا وَمَن جَاء بِالسَّيِّئَةِ فَلاَ يُجْزَى إِلاَّ مِثْلَهَا وَهُمْ لاَ يُظْلَمُونَ
He, who has done good shall have ten times to his credit: he who has done evil shall only be punished equivalent to his evil. Injustice will never be done to anybody.