Surah Al-Baqarah (The Cow), Verse 13

وَاِذَا قِیْلَ لَهُمْ اٰمِنُوْا كَمَاۤ اٰمَنَ النَّاسُ قَالُوْۤا اَنُؤْمِنُ كَمَاۤ اٰمَنَ السُّفَهَآءُ اَلَاۤ اِنَّهُمْ هُمُ السُّفَهَآءُ وَلٰكِنْ لَّا یَعْلَمُوْنَ ۟

Wa izaa qeela lahum aaminoo kamaaa aamanan naasu qaalooo anu'minu kamaaa aamanas sufahaaa'; alaaa innahum humus sufahaaa'u wa laakil laa ya'lamoon

“When it is said to them: "Believe as the others believe:" They say: "Shall we believe as the fools believe?" Nay, of a surety they are the fools, but they do not know.”

Quran 2:13 (Yusuf Ali Translation)