Surah Al-A'raf (The Heights), Verse 66

قَالَ الْمَلَاُ الَّذِیْنَ كَفَرُوْا مِنْ قَوْمِهٖۤ اِنَّا لَنَرٰىكَ فِیْ سَفَاهَةٍ وَّاِنَّا لَنَظُنُّكَ مِنَ الْكٰذِبِیْنَ ۟

Qaalal mala ul lazeena kafaroo min qawmiheee innaa lanaraaka fee safaahatinw wa innaa la nazunnuka minal kaazibeen

“The leaders of the Unbelievers among his people said: "Ah! we see thou art an imbecile!" and "We think thou art a liar!"”

Quran 7:66 (Yusuf Ali Translation)