Quran 20:107 from Surah Taa-Haa on Divine Marvels.
لَّا تَرَىٰ فِيهَا عِوَجٗا وَلَآ أَمۡتٗا
English translation: Not you will see in it any crookedness and not any curve
Transliteration: la tara fiha iwajan wala amtan