Surah Al-Kahf (The Cave), Verse 30

اِنَّ الَّذِیْنَ اٰمَنُوْا وَعَمِلُوا الصّٰلِحٰتِ اِنَّا لَا نُضِیْعُ اَجْرَ مَنْ اَحْسَنَ عَمَلًا ۟

Innal lazeena aamanoo wa 'amilus saalihaati innaa laa nudee'u ajra man ahsana 'amalaa

“As to those who believe and work righteousness, verily We shall not suffer to perish the reward of any who do a (single) righteous deed.”

Quran 18:30 (Yusuf Ali Translation)