Whoever does a righteous work receives the reward for ten, and the one who commits a sin is requited for only one. No one suffers the slightest injustice.
مَن جاءَ بِالحَسَنَةِ فَلَهُ عَشرُ أَمثالِها وَمَن جاءَ بِالسَّيِّئَةِ فَلا يُجزىٰ إِلّا مِثلَها وَهُم لا يُظلَمونَ
man jaaa’a bilhasanati falahoo ‘ashru amsaalihaa wa man jaaa’a bissaiyi’ati falaa yujzaaa illaa mislahaa wa hum laa yuzlamoon