Surah Al-Baqarah (The Cow), Verse 55

وَاِذْ قُلْتُمْ یٰمُوْسٰی لَنْ نُّؤْمِنَ لَكَ حَتّٰی نَرَی اللّٰهَ جَهْرَةً فَاَخَذَتْكُمُ الصّٰعِقَةُ وَاَنْتُمْ تَنْظُرُوْنَ ۟

Wa iz qultum yaa Moosaa lan nu'mina laka hattaa naral laaha jahratan fa akhazat kumus saa'iqatu wa antum tanzuroon

“And remember ye said: "O Moses! We shall never believe in thee until we see Allah manifestly," but ye were dazed with thunder and lighting even as ye looked on.”

Quran 2:55 (Yusuf Ali Translation)