Quran 2:103 from Surah Al-Baqara on Divine Marvels.
وَلَوۡ أَنَّهُمۡ ءَامَنُواْ وَٱتَّقَوۡاْ لَمَثُوبَةٞ مِّنۡ عِندِ ٱللَّهِ خَيۡرٞۚ لَّوۡ كَانُواْ يَعۡلَمُونَ
English translation: And if [that] they (had) believed and feared (Allah) surely (the) reward (of) from Allah (would have been) better if they were (to) know
Transliteration: walaw annahum amanu wa-ittaqaw lamathubatun min indi al-lahi khayrun law kanu ya'lamuna