Surah Al-Anbiya' (The Prophets), Verse 5

بَلْ قَالُوْۤا اَضْغَاثُ اَحْلَامٍ بَلِ افْتَرٰىهُ بَلْ هُوَ شَاعِرٌ فَلْیَاْتِنَا بِاٰیَةٍ كَمَاۤ اُرْسِلَ الْاَوَّلُوْنَ ۟

Bal qaalooo adghaasu ahlaamin bal iftaraahu bal huwa shaa'irun fal ya'tinaa bi Aayatin kamaa ursilal awwaloon

“"Nay," they say, "(these are) medleys of dream! - Nay, He forged it! - Nay, He is (but) a poet! Let him then bring us a Sign like the ones that were sent to (Prophets) of old!"”

Quran 21:5 (Yusuf Ali Translation)