Quran 68:4 from Surah Al-Qalam on Divine Marvels.
وَإِنَّكَ لَعَلَىٰ خُلُقٍ عَظِيمٖ
English translation: And indeed you surely (are) (of) a moral character great
Transliteration: wa-innaka la'ala khuluqin azimin