Quran 3:60 from Surah Aal-i-Imraan on Divine Marvels.
ٱلۡحَقُّ مِن رَّبِّكَ فَلَا تَكُن مِّنَ ٱلۡمُمۡتَرِينَ
English translation: The truth (is) from your Lord so (do) not be among the doubters
Transliteration: al-haqu min rabbika fala takun mina al-mum'tarina