Quran 30:6 from Surah Ar-Room on Divine Marvels.
وَعۡدَ ٱللَّهِۖ لَا يُخۡلِفُ ٱللَّهُ وَعۡدَهُۥ وَلَٰكِنَّ أَكۡثَرَ ٱلنَّاسِ لَا يَعۡلَمُونَ
English translation: (It is the) Promise (of) Allah (Does) not fail Allah (in) His promise but most (of) [the] people (do) not know
Transliteration: wa'da al-lahi la yukh'lifu al-lahu wa'dahu walakinna akthara al-nasi la ya'lamuna