Quran 2:147 from Surah Al-Baqara on Divine Marvels.
ٱلۡحَقُّ مِن رَّبِّكَ فَلَا تَكُونَنَّ مِنَ ٱلۡمُمۡتَرِينَ
English translation: The Truth (is) from your Lord so (do) not be among the doubters
Transliteration: al-haqu min rabbika fala takunanna mina al-mum'tarina