Quran 2:169 from Surah Al-Baqara on Divine Marvels.
إِنَّمَا يَأۡمُرُكُم بِٱلسُّوٓءِ وَٱلۡفَحۡشَآءِ وَأَن تَقُولُواْ عَلَى ٱللَّهِ مَا لَا تَعۡلَمُونَ
English translation: Only he commands you to (do) the evil and the shameful and that you say about Allah what not you know
Transliteration: innama yamurukum bil-sui wal-fahshai wa-an taqulu ala al-lahi ma la ta'lamuna