Quran 41:53 from Surah Fussilat on Divine Marvels.
سَنُرِيهِمۡ ءَايَٰتِنَا فِي ٱلۡأٓفَاقِ وَفِيٓ أَنفُسِهِمۡ حَتَّىٰ يَتَبَيَّنَ لَهُمۡ أَنَّهُ ٱلۡحَقُّۗ أَوَلَمۡ يَكۡفِ بِرَبِّكَ أَنَّهُۥ عَلَىٰ كُلِّ شَيۡءٖ شَهِيدٌ
English translation: Soon We will show them Our Signs in the horizons and in themselves until becomes clear to them that it (is) the truth Is (it) not sufficient concerning your Lord that He (is) over all things a Witness
Transliteration: sanurihim ayatina fi al-afaqi wafi anfusihim hatta yatabayyana lahum annahu al-haqu awalam yakfi birabbika annahu ala kulli shayin shahidun