Al-An'am - 6:160

مَن جَاء بِالْحَسَنَةِ فَلَهُ عَشْرُ أَمْثَالِهَا وَمَن جَاء بِالسَّيِّئَةِ فَلاَ يُجْزَى إِلاَّ مِثْلَهَا وَهُمْ لاَ يُظْلَمُونَ
[6:160]
Whoever brings a good deed, he shall have ten like it, and whoever brings an evil deed, he shall be recompensed only with the like of it, and they shall not be dealt with unjustly.
He that doeth good shall have ten times as much to his credit: He that doeth evil shall only be recompensed according to his evil: no wrong shall be done unto (any of) them.
Whoso bringeth a good deed will receive tenfold the like thereof, while whoso bringeth an ill-deed will be awarded but the like thereof; and they will not be wronged.