Quran 20:2 from Surah Taa-Haa on Divine Marvels.
مَآ أَنزَلۡنَا عَلَيۡكَ ٱلۡقُرۡءَانَ لِتَشۡقَىٰٓ
English translation: Not We (have) sent down to you the Quran that you be distressed
Transliteration: ma anzalna alayka al-qur'ana litashqa