Surah An-Nisa' (The Women), Verse 40

اِنَّ اللّٰهَ لَا یَظْلِمُ مِثْقَالَ ذَرَّةٍ وَاِنْ تَكُ حَسَنَةً یُّضٰعِفْهَا وَیُؤْتِ مِنْ لَّدُنْهُ اَجْرًا عَظِیْمًا ۟

Innal laaha laa yazlimu misqaala zarratinw wa in taku hasanatany yudaa'ifhaa wa yu'ti mil ladunhu ajran 'azeemaa

“Allah is never unjust in the least degree: If there is any good (done), He doubleth it, and giveth from His own presence a great reward.”

Quran 4:40 (Yusuf Ali Translation)