Quran 72:4 from Surah Al-Jinn on Divine Marvels.
وَأَنَّهُۥ كَانَ يَقُولُ سَفِيهُنَا عَلَى ٱللَّهِ شَطَطٗا
English translation: And that he used (to) speak the foolish among us against Allah an excessive transgression
Transliteration: wa-annahu kana yaqulu safihuna ala al-lahi shatatan