Al-Anbiya' - 21:5

بَلْ قَالُواْ أَضْغَاثُ أَحْلاَمٍ بَلِ افْتَرَاهُ بَلْ هُوَ شَاعِرٌ فَلْيَأْتِنَا بِآيَةٍ كَمَا أُرْسِلَ الأَوَّلُونَ
[21:5]
Nay! say they: Medleys of dreams; nay! he has forged it; nay! he is a poet; so let him bring to us a sign as the former (prophets) were sent (with).
"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!"
Nay, say they, (these are but) muddled dreams; nay, he hath but invented it; nay, he is but a poet. Let him bring us a portent even as those of old (who were Allah's messengers) were sent (with portents).