Quran 18:30 from Surah Al-Kahf on Divine Marvels.
إِنَّ ٱلَّذِينَ ءَامَنُواْ وَعَمِلُواْ ٱلصَّٰلِحَٰتِ إِنَّا لَا نُضِيعُ أَجۡرَ مَنۡ أَحۡسَنَ عَمَلًا
English translation: Indeed those who believed and did the good deeds indeed, We will not let go waste will not let go waste (the) reward (of one) who does good deeds
Transliteration: inna alladhina amanu wa'amilu al-salihati inna la nudi'u ajra man ahsana amalan